An absent-minded physics professor has left her notebook on top of her car. The notebook has mass m = 1 kg. If the coefficient of static friction is u=0.7, then what is the largest linear acceleration the car can have without the notebook sliding off?

A 0.32 kg ball is attached to a 1.4 m long string, and moves in a circular path on a smooth horizontal table. If the ball takes 0.6 seconds for each complete revolution, what is the tension in the string in N?

Problem 2. Consider the system shown in Figure 1 with m,= 12.5 kg, m, = 20.0 kg. Object m, is resting on the floor, and object m, is 4.00 m above the floor when it is released from rest. The pulley axis is frictionless. The cord is light does not stretch, and does not slip on the pulley a. What is the magnitude %3D %3D the acceleration of the object. b. Calculate the time interval required for m, to hit the floor

You and your friend Peter are putting new shingles on a roof pitched at 21°. You're sitting on the very top of the roof when Peter, who is on the edge of the roof, 5.5 m away, asks you for the box of nails. Rather than carry the 2.5 kg box of nails down to Peter, you decide to give the box a push and have it slide down to him. If the coefficient of kinetic friction between the box and the roof is 0.54, with what speed should you push the box to have it gently come to rest right at the edge of the roof? Express your answer with the appropriate units. ► View Available Hint(s) v = μA Value Submit Units ?