A student in a lab experiment jumps upward o 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 ?
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Question 2
2.
A force of 5 N is required to increase the speed of a box from a rate of 1.0 m/s² to 3.0 m/s² within 5 s along a level surface. What change would most likely require additional force to produce the same results?
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Question 3
3.
Akbar and Lucia apply opposing forces on a wheeled cart that has a mass of 10 kg. The cart accelerates toward Akbar at a rate of 2 m/s². What is the amount of force applied by Lucia?
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Question 4
4.
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?
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Question 5
5.
A probe traveling through outer space is moving at a constant velocity. Which statement applies to the motion of this probe?
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Question 6
6.
Which statement best describes what must happen in order for a person to lift an object?
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Question 7
7.
The diagram represents forces acting on a block that accelerates 6.0 m/s² on a frictionless surface.
What is the mass of the block?
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Question 8
8.
A 2000 kg car is pulling a 1000 kg trailer. The car's engine exerts a 6000 N force to move the car and the trailer. In addition, the car and the trailer each experience a 1000 N frictional force as they are being pulled, as represented below.
What is the magnitude of the net force on this system?
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Question 9
9.
A ball has a mass of 0.1 kg and an initial velocity of 20 m/s. The ball is given an acceleration of 30 m/s2 for 5 s. What is the net force on the ball during acceleration?
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Question 10
10.
The diagram below 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?
