Question 1 What is the magnitude of the linear momentum of a 5 g cart moving at 2 m/s? 0.01 kgm/s 0.001 kgm/s 0.1 kgm/s 10 kgm/s Question 2 2 pts What is the value of the angular momentum of a 5 g solid sphere with a radius of 1 m rotating at 5 rad/s? O 0.01 kgm*m/s 0.1 kgm*m/s 10 kgm*m/s 1 kgm*m/s Question 3 2 pts Ball 1 collides into ball 2 which is at rest. If the collision is elastic and the mass of ball 1 is bigger than that of ball 2, then after the collision the linear speed of ball 1 will be smaller than that of ball 2 the same as that of ball 2 greater than that of ball 2 can not be determined with the information provided Question 4 A man is standing on a turntable with his arms by his sides. When he quickly raises his arms, his angular momentum remains the same his angular momentum decreases his angular momentum increases nothing can be said about his state of motion Question 5 2 pts In a hurry to catch a cab, you rush through a frictionless swinging door and onto the sidewalk. The force you exerted on the door was 25 N, applied perpendicularly to the plane of the door. The door is 1.2 m wide. Assuming that you pushed the door at its edge, what was the torque on the door with its hinge as the pivot? 30 Nm 0 Nm 25 Nm 1.2 Nm Question 6 In which direction is the torque in the figure below: Rotation out of the page into the page nowhere can not be determined r F What is the impulse delivered to a 2 kg ball that is initially at rest, and reaches a speed of 5 m/s after it is struck? 10 Ns 2 Ns 15 Ns 5 Ns Question 8 The angular momentum of a system changes from 0 kgm/s to 50 kgm/s in 2 s. What was the torque applied to the system for this change? 25 Nm 50 Nm 100 Nm 2 Nm Question 9 3 pts How much work is done by friction whena 5 kg box is pulled through 2 m by a 5 N force acting horizontally on the box? Let the coefficient of friction between the box and the surface its dragged on be 0.12. 0-12J O-11 J 12 J O-13 J