Question

3. An object of mass 90 kg travels down a slide.

Calculate the change in gravitational potential energy in joules of the object when it moves 15 m
vertically downwards.
(2 Points)
Enter your answer
4. Calculate the maximum possible speed in m/s that the object in question 3 could reach at the
bottom of the slide.
Give your answer to 3.s.f
(3 Points)
Enter your answer

Answer 1

gpe= 90* 9.81 * 15 = 13243.5 Joules

KE= 13243.5 =1/2 m v^2
v^2= 295.3
v= 17.2 m/s