If we consider any system moving with uniform circular motion we can notice that the MAGNITUDE of the accelaration remains constant. However, there is a change in the direction of the acceleration at every instant of time .

As the object moves through the circle the acceleration changes its direction always pointing to the center of the circle.

6 0

4 years ago

A 20.0-kg rock is dropped and hits the ground at a speed of 90.0 m/s. Calculate the rock’s gravitational potential energy before

KonstantinChe [14]

Answer:

GPE=81000J or 81kJ

Explanation

Potential Energy = mgh = 20 x 9.8 x ?

To find H use one of the equation of motion 

= [(90)^2 - 0 ] / 2(9.8) 

Potential Energy = mgh = 20 x 9.8 x 8100 /2(9.8) = 81000 J

5 0

3 years ago

Read 2 more answers

The map of the world is overlaid with the boundaries of the tectonic plates. Look at the location marked with an asterisk (*). W

Sholpan [36]

C) mountains; two continental plates meet at a convergent boundary

6 0

3 years ago

A worker wants to load some bricks in to his van. there are 1000 bricks and when stacked neatly they measure 2m by 1m by 1m, wha

inessss [21]

lenddbisnwjw whwjwiwnww

8 0