Practice Test: Mr. Rogers AP Physics CNewton's Laws 


Online Quiz  Newton's Law QA79D439C 

Mr. Rogers AP Physics Big Beautiful Bodacious Newton's Law Practice Test 

Assume magic land unless otherwise stated. Use g = 10 m/s^{2}  
1  )  Martha pushes downward on a trunk with a force of 600 newtons. The force makes a thirty degree angle with the horizon and the trunk weighs 800 newtons. What is the normal force on the trunk. 
2  )  Ralph stands on a bathroom scale as his elevator accelerates upward at 0.75 g's. His mass = 100 kg. What does the scale read. Assume the scale uses units of newtons. 
3  )  A mass of 2m is attached to the rope on one side of a pulley. A mass of 5m is attached to the other side. Find the magnitude of acceleration for each mass when the mass are released. 
4  )  Alfred suspects a problem and decides to measure gravity using an Atwood machine. He uses a mass of 4m on one side of the pulley and 2m on the other. This yields an acceleration of 5 m/s/s. What is the value of g? 
5  )  A buzzard has a mass = 2 kg. He lands on a magical wire with no mass stretched horizontally between poles 150 meters apart. Murphy lands exactly half way between the two poles. The wire sags 2 cm. What is the tension in the wire? 
Draw free body diagrams (FBD) for the following problems. Construct the arrows roughly to scale. In other words, if one force is larger than another it should be drawn larger.  
6  )  Bob pushes Martha on a swing. Draw a FBD when the swing's ropes makes an angle of theta with a vertical line and Bob gives Martha a push. 
7  )  Martha on a swings freely. The swing's ropes makes an angle of theta with a vertical line. Draw a FBD. 
8  )  Martha is on a swing. Bob holds her to prevent her from swinging forward. The swing's ropes makes an angle of theta with a vertical line. Draw a FBD. 
9  )  Juan parks his car on a 10 degree slope. Draw the FBD. 
10  )  A pendulum swings to it's highest position. Draw the FBD. 
11  )  A falling object accelerates downward at 1/2 g. Draw the FBD. 
12  )  A falling object reaches terminal velocity. Draw the FBD. 
Answers 
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