Unit 2 Exam

A. the hands of a clock relative to the numbers on a clock

B. the distance a race car traveled relative to the time of travel

C. the speed of a bicycle relative to the direction of travel

D. the velocity change of a train realtive to time

A. acceleration and time

B. velocity and time

C. distance and time

D. motion and time

A. Velocity has motion and speed does not.

B. Velocity has direction and speed does not.

C. Velocity involves time and speed does not.

D. Velocity involves acceleration and speed does not.

A. motion change vs. time

B. distance change vs. time

C. speed change vs. time

D. velocity change vs. time

A. a push or a pull always causing motion

B. a push or a pull always causing acceleration

C. a push or a pull acting without an object

D. a push or a pull acting on an object

A. a combination of all motions of an object

B. a combination of all motions of an object in two directions

C. a combination of all forces acting on an object

D. a combination of all forces acting on an object in two directions

A. balanced

B. unbalanced

C. a push

D. a pull

A. balanced forces

B. unbalanced forces

C. either balanced or unbalanced forces

D. any combination of forces

A. friction

B. motion

C. velocity

D. acceleration

A. the force and the roughness of the surfaces

B. hills and valleys and the roughness of the surfaces

C. the force and how much surfaces come in contact

D. the force and the weight exerted on the surfaces

A. a book sitting on a table

B. a cat standing in a yard

C. a box sliding on a floor

D. a child leaning on a building

A. a pencil rolling on a table

B. a dog running in a yard

C. a chair sliding on a floor

D. a worker pushing on a non-moving box

A. engine parts wearing out

B. car tires moving a car forward

C. soil erosion

D. holes developing in your socks

A. brakes stopping a car

B. a person walking

C. an eraser erasing

D. car engine parts wearing out

A. using ball bearings

B. using sandpaper to smooth a surface

C. pouring sand on ice

D. lubricating with oil

A. but small amounts of mass are unaffected by gravity.

B. and all mass is affected by gravity.

C. but only the Earth's gravity affects matter.

D. but only the Earth's and sun's gravity affects matter.

A. decreases.

B. does not change.

C. increases only slightly.

D. increases greatly.

A. changes as gravitational force changes

B. is constant

C. is a measure of gravitational force

D. can be measured in newtons

A. a newton

B. a lubricant

C. a singularity

D. a reference point

A. starting velocity, distance traveled and speed.

B. starting point, end point and the object's mass.

C. starting velocity, final velocity and the time it takes to change velocity.

D. average speed, distance and the time it takes to change velocity.

A. have greater masses.

B. have rougher surfaces.

C. are farther apart.

D. are moving at greater speed.

A. 5 N south

B. 15 N north

C. 50 N north

D. 5 N north

A. different on the moon than on Earth.

B. a measure of gravitational force.

C. a measure of the amount of matter present.

D. measured in newtons.

A. average speed.

B. average velocity.

C. average acceleration.

D. average motion.

A. The cannonball lands first.

B. The baseball lands first.

C. The balls land at the same time.

D. The ball with the larger volume lands first.

A. its size

B. its chemical properties

C. its shape

D. its speed

A. There is no gravity in space.

B. Air resistance opposes gravity.

C. They have no mass in space.

D. They are in free fall.

A. both vertically and horizontally

B. vertically downward

C. vertically upward

D. horizontally forward

A. is greater than your weight.

B. is equal to your weight.

C. is determined by many factors.

D. varies.

A. F = m x a

B. m = F x a

C. a = m x F

D. F = m/a

A. decreases.

B. remains unchanged.

C. increases.

D. is transferred to its surroundings.

A. 77.8 N

B. 25,200 N

C. 77.8 kg*m/s

D. 25,200 kg*m/s

A. the momentum of both the pin and the ball increases.

B. the momentum transfers from the ball to the pin.

C. the momentum of both the pin and the ball decreases.

D. the momentum of both the pin and the ball does not change.

A. exerted on the table.

B. exerted on all the other billiard balls.

C. not present.

D. exerted by the billiard ball on the cue ball.

A. the path of a leaping frog

B. the path of an arrow through the air

C. the path of a crate sliding along flat ground

D. the path of a pitched baseball

A. an empty shopping cart pushed with a hard force

B. a full shopping cart pushed with a hard force

C. an empty shopping cart pushed with a light force

D. a full shopping cart pushed with a light force

A. Momentum is transferred to the car at rest.

B. Momentum is transferred to the ground beneath the cars.

C. Momentum is transferred to the moving car.

D. There is no transfer of momentum.

A. the acceleration due to gravity is greater on the crumpled piece of paper.

B. there is more air resistance against the flat paper.

C. the crumpled paper is more massive.

D. the crumpled paper is less massive.

A. 4 kg.

B. 6,000 g.

C. 2 kg.

D. 1,500 g.

A. remain in motion.

B. eventually come to a stop.

C. change its momentum.

D. accelerate.

A. It is greater than the original momentum of the cue ball.

B. It is equal to the momentum before the collision.

C. It is less than the original momentum of the cue ball.

D. It is equal to zero.

A. the forces between a bat and a ball.

B. the attractive force between a falling ball and the Earth.

C. the force of thrust and the force of gravity acting on an airplane.

D. the forces between a grasshopper and the ground.

A. 130 kg*m/s

B. 32 kg*m/s

C. 130 N

D. 32 N

A. There is no acceleration on the ball.

B. The ball is accelerated in the horizontal direction only.

C. The ball is accelerated by gravity in the vertical direction only.

D. The ball is accelerated in both the horizontal and vertical directions.

A. All would hit at the same time.

B. The rubber ball would hit first.

C. The steel ball would hit first.

D. The plastic ball would hit first.

A. at terminal velocity.

B. in free fall.

C. experiencing air resistance.

D. weightless.

A. remain in motion.

B. eventually come to a stop.

C. change its momentum.

D. accelerate.

A. orbiting.

B. free fall.

C. momentum conservation.

D. inertia.

A. 6.1 kg

B. 59 kg

C. 1.6 kg

D. 0.61 kg

A. is greater than the force of air resistance.

B. is less than the force of air resistance.

C. is equal to the force of air resistance.

D. is the only force acting on the object.

A. pound

B. meter

C. pascal

D. calorie

A. Water is denser than air.

B. Air is denser than ice.

C. Ice is denser than air.

D. Air has more pressure.

A. The pressure decreases.

B. The pressure stays the same.

C. The pressure almost equals zero.

D. The pressure increases.

A. even air pressure

B. neutral force

C. gravity

D. uneven air pressure

A. turbulence

B. air quality

C. wing size

D. speed

A. at sea level

B. on a mountaintop

C. at the altitude at which planes fly

D. at the outer edge of the atmosphere

A. pressure.

B. mass.

C. volume.

D. temperature.

A. Liquids cannot be compressed very much.

B. Water is about 1000 times denser than air.

C. pressure is the amount of force exerted over a given area.

D. The weight of the atmosphere pushes down on the water.

A. some objects float.

B. birds and airplanes can fly.

C. bubbles are round.

D. objects seem to weigh less in water.

A. turbulence

B. gravity

C. wing surface area

D. the airplane's speed

A. the depth of the ocean

B. the shape of the ship

C. the mass of the ship's contents

D. the density of the ships materials

A. All can flow.

B. Some take the shape of their container.

C. Liquids and gases are included.

D. Molecules move easily past each other.

A. the force per unit area increases.

B. the number of pascals decreases.

C. the air molecules slow down.

D. the air takes up less space.

A. decreases with depth.

B. is about twice as much on a diver at 10 m as at the surface.

C. is less than air pressure for the same volume of air and water.

D. is unaffected by atmospheric pressure.

A. buoyancy

B. gravity

C. air quality

D. lift

A. depth of the water

B. number of people in the canoe

C. shape of the canoe

D. density of the canoe's material

A. to reduce cabin pressure

B. to increase drag

C. to reduce drag

D. to increase cabin pressure

A. water

B. helium

C. ice

D. gold

A. pressure = area/force

B. pressure = force/area

C. pressure = mass/volume

D. pressure = volume/mass

A. Air moves from high pressure (in the lungs) to low pressure (outside).

B. Lung pressure decreases.

C. Space in your lungs increases.

D. Air moves from low pressure (in the lungs) to high pressure (outside).

A. one-third the pressure at the surface.

B. 100 times the pressure at the surface.

C. 1,000 times the pressure at the surface.

D. twice the pressure at the surface.

A. The air pressure is higher inside the tornado than outside.

B. The air pressure is lower outside the tornado than inside.

C. The air pressure is lower inside the tornado than outside.

D. the air pressure is the same inside and outside the tornado.

A. Air moves from low pressure (outside) to high pressure (in the lungs).

B. Lung pressure decreases.

C. Oxygen comes into the lungs?

D. Air moves from high pressure (in the lungs) to low pressure (outside).

A. 0 to 10

B. 10 to 20

C. 40 to 50

D. 90 to 100

A. As you decrease the atmospheric pressure, the altitude increases.

B. Atmospheric pressure changes at the same rate as you go up in the atmosphere.

C. As you move higher into the atmosphere, the atmospheric pressure decreases.

D. Atmospheric pressure increases with altitude.