Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is ?k = 0.26 and the blocks are released from rest, determine the change in the kinetic energy of block A as it moves from C to D, a distance of 25 m up the incline.

A golfer hit a 40.71 gram golf ball from the fairway giving it an initial velocity of 37.3 m/s.  It lands on the green, which is at the same elevation as the fairway, and strikes the ground with a final velocity of 16.1 m/s.  What is the work (in J) done on the ball by the non-conservative friction forces

125% e + Problem 11: The atwood machine shown is released from rest. Using the work-energy theorem, find the speed of the 10 kg mass after it has fallen a distance of 1 meter. Assume the pulley is massless and there is no friction in the axel. 10 kg ल 5 kg Problem 12: A cube of mass m is initially at rest at the for inclined s which henn height

Consider the skateboarder in the Figure. If she has a mass of 55 kg, an initial velocity of 20 m/s, and a velocity of 12 m/s at the top of the ramp along horizontal direction. After that she flies into the air and strikes the ground. (Ignore air friction and the kinetic energy of the skateboard) a)What is the work done by friction on the skateboarder? (b)Calculate the flight time of the skateboarder. (c)Calculate the velocity at which she strikes at the

In the pitching motion, a baseball pitcher exerted an average horizontal force of 80 N against the 0.15 kg baseball while moving it through a horizontal displacement of 2.2 m before he released it. How much work did the pitcher do to the baseball as a result of this force? If the baseball’s velocity at the start of the pitching action was zero, how fast was the ball moving at the instant of release?

A skier, starting from rest, coasts down a mountain that makes an angle of 20.0 ° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.167. She coasts for a distance of 13.5 m before coming to the edge of a cliff. Use the Work-Energy theorem to find her speed at the edge of the cliff.

A stone used in the sport of curling has a mass of 18.0 kg and is initially at rest, sitting on a flat horizontal ice surface. It is pushed with a constant horizontal force of magnitude 24.0 N over a distance of 4.00 m.  Starting from your calculated values for acceleration and final speed, calculate the duration of the bush. Compare this with the time calculated from the average power supplied during the push and the amount of work done.

The Super Sled travels with an initial kinetic energy of 3369 J horizontally and to the right along a frictionless flat surface, initially at a height of zero (initial gravitational potential energy = 0). The driver briefly engages the rocket over a distance (Ax) of 2.000 m, pushing the sled with a force of 400.0 N over that distance. The rocket is then turned off. The sled then goes up an inclined surface with a rough surface. The coefficient of kinetic friction on the incline is uk. At the top of the incline, the sled reaches a height h = 1.500 m above the ground where the surface becomes flat and frictionless again. The sled (including the rocket and driver) has a total mass of 87.00 kg. (Notes: assume that g = 9.810 m/s² , and that the mass of fuel used by the rocket is negligible. Do not use scientific notation). After &, rocket rocket Before propulsion propulsion starts ends rough inclined surface rocket frictionless engaged coefficient of kinetic friction = H surface h = 1.500 m…

Two blocks, A and B (with mass 30 kg and 110 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is u, = 0.21. Determine the change in the kinetic energy of block A as it moves from to 0 a distance of 24 m up the incline (and block B drops downward a distance of 24 m) if the system starts from rest. A 37°

Consider the system shown below (Figure 1). The rope and pulley have negligible mass, and the pulley is frictionless. Initially the 6.00 kgkg block is moving downward and the 8.00 kgkg block is moving to the right, both with a speed of 0.600 m/sm/s. The blocks come to rest after moving 3.50 mm.  Use the work-energy theorem to calculate the coefficient of kinetic friction between the 8.00 kgkg block and the tabletop.