Question

a car of mass 1000 kg is moving with a speed of 36km/hr on a road calculate retarding force required to stop the car in a distance of 50 m

Answer 1

M=1000kg
V=36km/hr=10m/s
Dist=50m
Time=dist/velocity =5sec
acceleration, a=v/t=10/5=2m/sec^2
Force=mass×acceleration
=1000×2=2000N and..

Answer 2

Hey there,

◆ Answer-

F = -1000 N

◆ Explanation-

# Given-

m = 1000 kg

u = 36 km/hr = 10 m/s

v = 0

s = 50 m

# Solution-

Using Newton's 3rd kinematic eqn,

v^2 = u^2 + 2as

0 = 10^2 + 2×a×50

a = -100/100

a = -1 m/s^2

Retarding force is calculated by-

F = -ma

F = -1000 × 1

F = -1000 N

Therefore, retarding force is 1000 N in magnitude.

Hope this helps...