Assuming there are no energy losses due to friction or drag, the gravitational potential energy will change into kinetic potential energy as the car reaches the bottom of the slope. 

G.P.E = m*g*h
K.E = (m*v^2)/2

where 

m = mass of toy car (kg)
g = gravity (m/s^2) 
h = heigh of your car from the bottom (m)
v = velocity of the toy car as it reaches the bottom (m/s)

Equate K.E to G.P.E 

G.P.E = K.E

m*g*h = (m*v^2)/2

make v the subject of the formula 

v = (2*g*h)^(1/2)

Substitute g = 9.81 m/s^2 and h = 2m into the equation to get v 

v = (2*9.81*2)^(1/2)

v = 6.264 m/s 


Physics

A toy car slides down a slope. If the top of the slope is 2m higher than the foot of the slope, how fast will the car be moving when it reaches the foot? (Assume that all of its g.p.e is transformed to k.e

Mariam Cosmo

Profile

Q&A

About

Mariam is verified

Education

University of Oxford

Resource Academia

Availability

Subjects

Mariam Cosmo