A 250 kg cart is pushed slowly up an incline. How much work does the pushing force do in moving the cart up to a platform 1.2 m above the starting point with a distance along the incline of 8 m and a friction force of 140 N opposes the motion.
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A 250 kg cart is pushed slowly up an incline. How much work does the pushing force do in moving the cart up to a platform 1.2 m above the starting point with a distance along the incline of 8 m and a friction force of 140 N opposes the motion.
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- After being pushed (no matter what force) an object with mass 100 kg covers a distance of 15 m before stops because a frictional force of 20 N, what is the work done by that force? Caution: consider the friction acting in opposite direction of motion. Hint: Work consider all the acting forces.A 4.5kg sled is pulled across level snow with a force of 225N on a rope that is 35 degrees above the horizontal. If the sled moves 65.3m in 2.5 minutes, how much work does the person do on the sled? How much power is exerted on the sled? The person is pulling as hard as possible on the rope. How else can the amount of work be increased?A 22kg crate is at rest on a ramp with an incline of 25 degrees. There is a coefficient of kinetic friction between the ramp and crate of 0.29. A force is applied to pull the crate up the incline at a constant speed. What is the work done by this force to pull the crate a distance L=2.45m up the ramp?
- A motorist runs out of gas on a level road 210 m from a gas station. The driver pushes the 1,120 kg car to the gas station. If a 180 N force is required to keep the car moving, how much work (in J) does the driver do?A helicopter lifts a 65 kg astronaut 18 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. (a) How much work is done on the astronaut by the force from the helicopter? (b) How much work is done on the astronaut by her weight? (c) What is the kinetic energy? (d) What is the speed of the astronaut just before she reaches the helicopter? m/sA child on a sled is initially at rest on an icy horizontal surface. The sled is pushed until it reaches a final velocity of 6.60 m/s in a distance of 12.8 m. The coefficient of friction between the ice and runners of the sled is 0.200, and the weight of the child and the sled is 335 N. Find the work done by the force pushing the sled.
- Bob is pulling a box of his toys of mass 15.0 kg along a rough horizontal surface for a distance of 6.00 m. The tension force in the rope is 58.0 N and the angle is 30° with respect to the horizontal. The frictional force on the box is 12.0 N. How much work is done on the box by the normal force, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.A horse pulls a 300 kg sled for 50 m over level ground at constant speed, exerting a force of 3000 N at 30° above horizontal. How much work is done by the horse on the sled? 150 kJ 2940 J 130 kJBob is pulling a box of his toys of mass 15.0 kg along a rough horizontal surface for a distance of 6.00 m. The tension force in the rope is 58.0 N and the angle is 30° with respect to the horizontal. The frictional force on the box is 12.0 N. How much work is done on the box by the normal force, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.