You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, it moves a distance of 1.30 m in a time of 1.80 s. The readout on the display indicates that the average power you are producing is 88.0 W. What is the magnitude of the force that you exert on the handle?

At a carnival, you can try to ring a bell by striking a target with a 9.10-kg hammer. In response, a 0.410- kg metal piece is sent upward toward the bell, which is 5.05 m above. Suppose that 22.0% of the hammer's kinetic energy is used to do the work of sending the metal piece upward. How fast must the hammer be moving when it strikes the target so that the bell just barely rings?

Situation 02. A crate has a mass of 120kg and the coefficient of static and kinetic friction is 0.60 and 0.50, respectively. The crate starts from rest and the motor exerts a tension T= 1220 + 200t (N). If the elevation of the dock is 30 degrees from the horizontal, a. What is the velocity of the crate after 1sec? b. Compute the power transmitted after 1sec.

1. An object of mass m, = 5.60 kg placed on a frictionless, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging object of mass m2 = 9.50 kg as shown in the figure. How fast are the masses moving after m2 falls 1 m? Please use conservation of energy for this problem.

A funny car accelerates from rest through a measured track distance in time 56 s with the engine operating at a constant power 230 kW. If the track crew can increase the engine power by a differential amount 1.0 W, what is the change in the time required for the run? Number i 8.1 Units S

A .500kg block attached to a spring with length .60m and force constant 40.0 N/m, is at rest with the back of the block at point A on a frictionless horizontal air table. The mass of the spring is negligible. You move the block to the right along the surface by pulling with a constant 20.0 N horizontal force.  what's the block's speed when the black of the block reaches point B, which is 0.25 m to the right of point A.

The spring in the image has a spring constant of 8000 N/m. it is pressed 24.0cm from its normal length. When released, the spring launches a 5 kg block on a frictionless horizontal surface. The block then climbs a 2 m high ramp inclined at an angle of 35.0 degrees above the horizontal And has a coefficient of kinetic friction of 0.480. calculate the following: a. The initial speed of the block at the base of the ramp (vi) b. The final speed of the block at the very top of the ramp (v) c. The horizontal distance the block travels after it takes off from the top of the ramp (d) 35° Ramp 2m