Aboy pushes a rock up a hill in 20 seconds. if he applied a force of 20 n over a distance of 5 m on the rock, calculate the power required in this situation.

80 watts
0.2 watts
2,000 watts
5 watts

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

Why does lightning travel from clouds to the ground?

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.