Answer to Question #216987 in Physics for ran li

Question

1.A 90.0-N box is pulled 10.0 m along a level surface by a rope. If the rope makes an angle of 20.0° with the surface, and the force exerted through the rope is 75.0 N, the work is done on the box is ___J. (Give your answer with the correct number of sig digs and do not include units)

2.A 25.0-N object is held 2.10 m above the ground. The potential energy of the object with respect to the ground is ___J. (Give your answer with the correct number of significant digits and do not include units).

3.The kinetic energy of a 20.0-N object is 5.00 × 10² J. The speed of this object is ___m/s. (Give your answer with the correct number of sig digs and do not include units).

4.A 10.0-N object is accelerated uniformly from rest at a rate of 2.5 m/s². The kinetic energy of this object after it has accelerated a distance of 15.0 m is ___J. (Give your answer with the correct number of sig digs and do not include units).

Answer 1

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