Can somebody please help me study! i wanna ace my physics test.

Posted on 2017-03-17 18:33:00 in Physics by POLARD

i ve been studying and i did some of the questions but i dont know if their right or wrong 

1 Calculate the momentum of a 265 kg motorcycle traveling at 25 m/s.

2. A rubber ball (1 kg) falls from a height of 10 m and collides elastically with the floor. What is the velocity of the ball as it rebounds from the floor?

3. Two clay balls collide and stick. Ball 1 has a mass of 10 kg and an initial velocity of 10 m/s in the positive x direction. Ball 2 has a mass of 20 kg and an initial velocity of 5 m/s in the negative x direction. What is the final velocity of the combined mass?

4. Two clay balls collide and stick. Ball 1 has a mass of 10 kg and an initial velocity of 5 m/s in the positive x direction. Ball 2 has a mass of 20 kg and an initial velocity of 5 m/s in the negative x direction. What is the final velocity of the combined mass? 

5. Two rubber balls undergo an elastic collision. Ball 1 has a mass of 10 kg and an initial velocity of 5 m/s in the positive x direction. Ball 2 has a mass of 10 kg and is stationary. What is the final velocity of the two balls, v1f, and v2f? 

6. A ceiling fan turns at a rate of 20 RPM what is its speed in radians per second, and the speed of a tip of a 50 cm fan blade in m/s? 

7. Calculate the angular momentum of a 265 kg motorcycle traveling at 25 m/s. traveling around a circular curve 500 m in radius 

8. A ceiling fan turns at a rate of 20 RPM. A 1 gram bug hangs on to the end of a 50 cm fan blade. What is the magnitude of the frictional force between the bug’s feet and the blade? 
9. A wrench 30 cm long is attached to a nut and bolt. You exert a 15 N force on the wrench. What is the maximum torque you can exert under these conditions? 

A uniform beam of length 10 m and mass 100 kg is supported by pylons on either end. A 200 kg box is centered at 5 m from the left end of the beam. What is the downward force on the left most pylon?

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