Answer:
F = 1400 N
Explanation:
It is given that,
Mass of the ball, m = 70 kg
It is moving with an acceleration of 20 m/s². We need to find the force exerted by the ball.
Force is given by the product of mass and acceleration. So,
F = ma

So, the force of 1400 N is exerted by a metal ball.
Just carbon is a metalloid not oxygen
because as the distance increases the gravitational force decreases so the weight of a body decreases
Mechanical Energy transforms into Thermal due to the moving parts rubbing on eachother creating heat and friction.