A horse pulls a 80 kg cart while moving at a rate of 3 m/s. The horse and driver hear a wolf howl in the distance and increases its speed to 7 m/s out of fear. What amount of work did the horse have to do in order to increase the kinetic energy of the cart?

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?