Fall 2022 Final CP
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Last updated over 1 year ago
30 questions
1
The figure shows a block that is being pulled along the floor. According to the figure, what is the acceleration of the block?
The figure shows a block that is being pulled along the floor. According to the figure, what is the acceleration of the block?
Driving Home Newton's Laws of Motion
Automobiles, baseballs, skateboards and bicycles --the world is full of things that are in motion. Centuries ago the British physicist Sir Isaac Newton stated three laws that describe the ways in which things move. These are Newton's three laws of motion:
The first law: Unless acted upon by an outside force, a body at rest tends to stay at rest, and a body in motion tends to stay in motion.
The second law: Acceleration is equal to the net force acting on a body divided by its mass.
The third law: For every action force there is an equal and opposite reaction force.
A driver starts her car and steps on the gas pedal. The car gradually accelerates to 50 km/hr. A few minutes later, the driver suddenly slams on the brakes to avoid hitting a box in the road. As the car comes to a stop, the driver's body appears to lurch forward in the seat until it is restrained by the seatbelt.
1
What law best explains why the driver's body appears to lurch forward when the brakes are suddenly applied?
What law best explains why the driver's body appears to lurch forward when the brakes are suddenly applied?
1
A force of 5 N is required to increase the speed of a box from a rate of 1.0 m/s to 3.0 m/s within 5 s along a level surface. What change would most likely require additional force to produce the same results?
A force of 5 N is required to increase the speed of a box from a rate of 1.0 m/s to 3.0 m/s within 5 s along a level surface. What change would most likely require additional force to produce the same results?
1
A hot air balloon exerts a force of 1200 N while lifting a load of 800 N. Which free-body force diagram depicts the forces involved?
A hot air balloon exerts a force of 1200 N while lifting a load of 800 N. Which free-body force diagram depicts the forces involved?
1
A student is driving her car when an insect strikes her windshield. Which of the following statements best describes the forces in this situation?
A student is driving her car when an insect strikes her windshield. Which of the following statements best describes the forces in this situation?
1
A rhinoceros is moving west at a velocity of 1 m/s with a tickbird on its back. The tickbird walks east at a velocity of 0.25 m/s relative to the rhinoceros. A photographer stands still to observe the animals. At what velocity is the tickbird traveling with respect to the photographer?
A rhinoceros is moving west at a velocity of 1 m/s with a tickbird on its back. The tickbird walks east at a velocity of 0.25 m/s relative to the rhinoceros. A photographer stands still to observe the animals. At what velocity is the tickbird traveling with respect to the photographer?
1
A ball is dropped from the top of a tall building. As the ball falls, the upward force of air resistance becomes equal to the downward pull of gravity. When these two forces become equal in magnitude, the ball will
A ball is dropped from the top of a tall building. As the ball falls, the upward force of air resistance becomes equal to the downward pull of gravity. When these two forces become equal in magnitude, the ball will
1
A student in a lab experiment jumps upward off a common bathroom scale as the lab partner records the scale reading. What does the lab partner observe during the instant the student pushes off?
A student in a lab experiment jumps upward off a common bathroom scale as the lab partner records the scale reading. What does the lab partner observe during the instant the student pushes off?
1
After a baseball is thrown up into the air, it will eventually fall back down to Earth. Which graph best demonstrates the relationship between time and distance from Earth as the baseball falls?
After a baseball is thrown up into the air, it will eventually fall back down to Earth. Which graph best demonstrates the relationship between time and distance from Earth as the baseball falls?
1
The path of a kicked football is shown in the diagram. The dashed line shows the path of the ball if the air resistance is neglected. Point X is a point along the path. Which arrow points in the direction of the acceleration?
The path of a kicked football is shown in the diagram. The dashed line shows the path of the ball if the air resistance is neglected. Point X is a point along the path. Which arrow points in the direction of the acceleration?
1
A ball is dropped from rest from a height 6.0 meters above the ground. The ball falls freely and reaches the ground 1.1 seconds later. What is the average speed of the ball?
A ball is dropped from rest from a height 6.0 meters above the ground. The ball falls freely and reaches the ground 1.1 seconds later. What is the average speed of the ball?
1
A person starts driving and travels 3 km east to a store. The person then turns around and travels 1 km west to another store. Finally, the person travels 2 km west, back to the starting point. What distance has this person traveled?
A person starts driving and travels 3 km east to a store. The person then turns around and travels 1 km west to another store. Finally, the person travels 2 km west, back to the starting point. What distance has this person traveled?
1
The graph would most likely apply to which of the following events?
The graph would most likely apply to which of the following events?
1
A technician wants to predict the velocity of a car that is accelerating at a constant rate. Which graph will help the technician with his prediction?
A technician wants to predict the velocity of a car that is accelerating at a constant rate. Which graph will help the technician with his prediction?
1
Which characteristic of motion could change without changing the velocity of an object?
Which characteristic of motion could change without changing the velocity of an object?
1
A ball is thrown horizontally. Which factor will increase the flight time of the ball?
A ball is thrown horizontally. Which factor will increase the flight time of the ball?
1
A book is placed at the top of the ramp made from a board. In order to cause the book to slide down the ramp, how should the ramp be changed?
A book is placed at the top of the ramp made from a board. In order to cause the book to slide down the ramp, how should the ramp be changed?
1
This graph shows the position of a car along a straight path as a function of time. What is the car's velocity at 2.0 sec?
This graph shows the position of a car along a straight path as a function of time. What is the car's velocity at 2.0 sec?
1
This graph shows weight versus mass for a group of objects on planet X. What is the acceleration due to gravity on planet X?
This graph shows weight versus mass for a group of objects on planet X. What is the acceleration due to gravity on planet X?
1
Four forces are acting on a box. This box will increase in speed
Four forces are acting on a box. This box will increase in speed
1
Jerry threw a ball into the air. It followed a curved path and soon fell to the ground because
Jerry threw a ball into the air. It followed a curved path and soon fell to the ground because
1
The diagram represents a block sliding across a table at a constant speed. All forces are shown except the frictional force. What is the magnitude of the frictional force on the block?
The diagram represents a block sliding across a table at a constant speed. All forces are shown except the frictional force. What is the magnitude of the frictional force on the block?
1
The graph below shows the movement of an object at several points in time. What is the average speed of the object?
The graph below shows the movement of an object at several points in time. What is the average speed of the object?
1
How much time is required for a bicycle to travel a distance of 100 m at an average speed of 2 m/s ?
How much time is required for a bicycle to travel a distance of 100 m at an average speed of 2 m/s ?
1
Two students are pushing a cart. The cart will move as if it were acted on by a single force with a magnitude of
Two students are pushing a cart. The cart will move as if it were acted on by a single force with a magnitude of
1
A 50-kg child on a skateboard experiences a 75-N force as shown. What is the expected acceleration of the child?
A 50-kg child on a skateboard experiences a 75-N force as shown. What is the expected acceleration of the child?
1
A skier starting from rest skis straight down a slope 50 meters long in 5.0 seconds. What is the magnitude of the acceleration of the skier?
A skier starting from rest skis straight down a slope 50 meters long in 5.0 seconds. What is the magnitude of the acceleration of the skier?
1
A 100-newton box rests on a horizontal surface. A force of 10 newtons parallel to the surface is required to start the box moving. What is the maximum coefficient of static friction between the box and the surface?
A 100-newton box rests on a horizontal surface. A force of 10 newtons parallel to the surface is required to start the box moving. What is the maximum coefficient of static friction between the box and the surface?
1
The table lists the coefficients of kinetic friction for four materials sliding over steel. A 10-kilogram block of each of the materials in the table is pulled horizontally across a steel floor at constant velocity. Which block would require the smallest applied force to keep it moving at constant velocity?
The table lists the coefficients of kinetic friction for four materials sliding over steel. A 10-kilogram block of each of the materials in the table is pulled horizontally across a steel floor at constant velocity. Which block would require the smallest applied force to keep it moving at constant velocity?
1
A wooden block is at rest on a horizontal steel surface. If a 10 newton force applied parallel to the surface is required to set the block in motion, how much force is required to keep the block moving at constant velocity?
A wooden block is at rest on a horizontal steel surface. If a 10 newton force applied parallel to the surface is required to set the block in motion, how much force is required to keep the block moving at constant velocity?