A small car with a mass M initially moves with velocity V flat road. The small car travels a distance D as it skids to a stop in an emergency. Assume the friction force between the tires and the road are constant during the stop.

If the same car now experiences a velocity of 3V, how does the stopping distance D compare?

A small car with a mass M initially moves with velocity V flat road. The small car travels a distance D as it skids to a stop in an emergency. Assume the friction force between the tires and the road are constant during the stop.

C. If a large truck with a mass of 2M and speed of V, how does the stopping distance D compare if the truck experiences the same friction force as the car?

A person applies a horizontal force to push a cart starting from rest. The applied force is shown in the Force-distance graph above. The sled experiences 2 N of Friction force.

A. Describe the motion of the cart from 6 to 8 meters. Justify your answer in one sentence.

(a)  

A person applies a horizontal force to push a cart starting from rest. The applied force is shown in the Force-distance graph above. The sled experiences 2 N of Friction force.

B. How much Work does the person do on the cart during the first 6 m trip of the trip?

(a)  

A person applies a horizontal force to push a cart starting from rest. The applied force is shown in the Force-distance graph above. The sled experiences 2 N of Friction force.

C. At what displacement is the object moving the fastest? (Hint: When has the most work been done overall?)

(a)  

A person applies a horizontal force to push a cart starting from rest. The applied force is shown in the Force-distance graph above. The sled experiences 2 N of Friction force.

D. What would you need to measure (that is not already given in the graph) to determine the increase in the cart's velocity (∆v) during the 10 m ride? Justify your answer in one sentence.