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?

A 40 N box is resting on a table when a 20 N force is applied to it horizontally. The coefficients of static and kinetic friction are 0.3 and 0.1, respectively. Which of the following best describes the resulting motion of the box?    The motion of the box cannot be determined with the given information.      The box accelerates in the direction of the applied force.      The box remains at rest.      The box moves with a constant velocity in the direction of the applied force.

A 1.0-kg block slides on a rough horizontal surface. A force, P = 9.0 N, is applied to the block at an angle to the horizontal as shown. The magnitude of the block's acceleration along the surface is 3.5 m/s?. What is the magnitude of the force of friction acting on the block? 30° 1.2 N 4.3 N 6.5 N O 15 N 7.2 N 9.0 N

What is the cofficient of static friction between the pavement and the car tires?

The drawing shows a cube (mass=26.6kg), being accelerated across a horizontal frictionless surface by a horizontal surface P. A small cube (mass= 4.4kg) is in contact with the front surface of the large cube and will slide downward unless P is sufficiently large. The coefficient of static friction between the cubes is 0.710. What is the smallest magnitude that P can have in order to keep the small cube from sliding downward?

A wooden box of mass 30 kg slides on a concrete floor. What is the coefficient of friction if the frictional force acting between the box and the surface is 180 N? 0.061 0.312 0.031 O 0.612

A 5.00 kg block is at rest on an inclined surface at angle 0 = 30.0°. The block is at rest and not sliding down the surface. Determine the magnitude of the frictional force in this experiment. (g=9.81 m/s?) L 98.0 N 49.0 N 24.5 N 42.4 N

A magician pulls a tablecloth from under a 200 g mug located 15.0 cm from the edge of the cloth. The cloth exerts a friction force of 0.100 N on the mug and is pulled with a constant acceleration of 3.00 m/s2. How far does the mug move relative to the horizontal tabletop before the cloth is completely out from under it? Note that the cloth must move more than 15 cm relative to the tabletop during the process.

Block 1 (10 kg) is pulled by a rope from left to right up a ramp which is inclined 50 degrees from the horizontal. The rope pulls on block 1 with a force of 150 N parallel to the surface of the inclined plane. The coefficient of kinetic friction between the block and the surface equals 0.3. Weight force on block 1 by EarthW1E =  i +  j N Tension force on block 1 by RopeT1R =  i +  j N Normal force on block 1 by SurfaceN1S =  i +  j N Frictional force on block 1 by Surfacef1S =  i +  j N What is the acceleration a of block 1?a =  i +  j m/s2

You push downward on a trunk at an angle 25° below the horizontal with a force of  750N If the trunk is on a flat surface and the coefficient of static friction between the surface and the trunk is 0.61, what is the most massive trunk you will be able to move?     93 kg     81 kg     112 kg     73 kg