What is energy?what its si unit​

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?

Which of the following is a true statement about the acceleration ~a of the pendulum bob ~a is equal to the acceleration due to gravity. ~a is perpendicular to the bob’s trajectory. ~a is equal to the instantaneous rate of change in velocity. ~a is tangent to the bob’s trajectory.

What is the role of the water cycle in maintaining freshwater levels in lake and rivers?