A 1200 gram ball rolling down a hill started with a velocity of 2 m/s. After 3 minutes, the velocity of the ball is 5.5 m/s. Determine the rate of work in Watts. *

A small block of mass 200 g starts at rest at A and slides along a curved frictionless track surface to B, then slides along the horizontal surface a distance 10 m before coming to rest at C due to friction between B and C. Find its speed at B and the work done by friction along the horizontal surface from B to C. 4.0 m B -10 m-

Block B is stacked on top of block A and does not slide with respect to A below – the blocks move as a single unit.  The blocks slide to the right on a horizontal surface of uniform roughness while a tension force is applied to block A horizontally to the right.  The blocks move a distance d and are speeding up.  The work that B does on A is __________.   a. Zero b. The magnitude of the tension force is needed to determine whether the work is positive, negative, or zero c. The masses of the blocks are needed to determine whether the work is positive, negative, or zero d. Negative e. Positive ------------------------------------------------------------------------------------------------------------- 2   The total work on A is __________. a. Negative b. The masses of the blocks are needed to determine whether the work is positive, negative, or zero c. Zero d. The magnitude of the tension force is needed to determine whether the work is positive,…

A 120 kg block is pulled at a constant speed of 2.5 m/s across a horizontal floor by an applied force of 105 N directed 20° above the horizontal. What is the rate at which the force does work on the block? Number i Units