Notifications
Clear all
Force and Laws of Motion
1
Posts
2
Users
0
Likes
205
Views
0
01/11/2021 7:25 pm
Topic starter
A car of mass 2400 kg moving with a velocity of 20 m s-1 is stopped in 10 seconds on applying brakes. Calculate the retardation and the retarding force.
1 Answer
0
01/11/2021 7:28 pm
Mass of the car = 2400 kg
Initial velocity u = 20 m/s
Final velocity v = 0 m/s
Time t = 10 s
Retardation a = \(\frac{v - u}{t}\)
= \(\frac{0 - 20}{10}\) = -2 m/s2
Force = m x a
= 2400 x -2 = -4800N