A block of mass m1 hangs from an ideal rope attached to a block of mass m2 which sits on an incline of angle φ. Friction is present between the ramp and m2. (d) Now someone briefly pushes the second block so that it begins to slide down. After the person stops pushing, what is the direction and magnitude of the force of kinetic friction on m2 if μk= 1/18? (e) What is the acceleration

When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. Suppose the weight of the sky diver is 965 N and the drag force has a magnitude of 1016 N. The mass of the sky diver is 98.5 kg. Take upward to be the positive direction. What is his acceleration, including sign?

If a 3.10 kg body has an acceleration of 7.20 m/s directed at 38.0° to the positive x axis, what is the x component of the net force acting on the body?

Two objects are connected by a massless cable passing over a frictionless pulley. Object A is positioned on a table, while object B hangs freely. The coefficient of kinetic friction between object A and the table is 0.09950. If the mass of object A is 150 kg, and the mass of object B is 238 kg, what is the acceleration of the objects?

A heavy box containing four packages is being delivered. From the delivery van, it slides down on a rough ramp angled at θ = 35.0◦ with respect to the ground. The coefficient of kinetic friction between the box and the ramp is µk = 0.350. If each package has a mass of 2.50 kg, what is magnitude of acceleration of the box?

A 105-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μk = 0.659. (a) What is the magnitude of the frictional force? (b) If the player comes to rest after 1.32 s, what is his initial speed?

An elevator filled with passengers has a mass of 1.70 × 103 kg . (a) The elevator accelerates upward from rest at a rate of 1.20 m/s2 for 1.50 s. Calculate the tension in the cable supporting the elevator. (b) The elevator continues upward at constant velocity for 8.50 s. What is the tension in the cable during this time? (c) The elevator decelerates at a rate of 0.600 m/s2 for 3.00 s. What is the tension in the cable during deceleration? (d) How high has the elevator moved above its original starting point, and what is its final velocity?

Two masses, m1 = 5 kg and m2 = 4 kg, are situated on a frictionless horizontal surface and connected by a rope. A force, F = 18 N, on the mass to the right. Determine the magnitude of the acceleration, a, of the two masses movingon the horizontal surface. Determine the tension T in the rope.

A large cube (mass = M) being accelerated across a horizontal frictionless surface by a horizontal force . A small cube (mass = m) is in contact with the front surface of the large cube and will slide downward unless is sufficiently large. The coefficient of static friction between the cubes is u. What is the smallest magnitude that F can have in order to keep the small cube from sliding downward?

Consider a 21.6-kg box on a ramp angled at 45.2 degrees above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.210 and the coefficient of static friction is 0.401. Find the magnitude of the acceleration (in m/s2) of the box down the ramp.