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A motor car of mass 800kg travelling at 20m/s is brought to rest by brake in 100m.calculate the average braking force required....Asked by feyonce
a motor car of mass 800kg travelling at 20m/s is brought to rest by breakes in 100m.calculate the average breaking force required.in physics
Answers
Answered by
MathMate
Use kinematics equation:
v1²-v0²=2aS
v1=final velocity (0 m/s)
v0=initial velocity (20 m/s)
S=distance travelled (100 m)
solve for
a=acceleration (negative because it's a deceleration)
Use Newton's second law
F=ma
m=mass
F=average (uniform) force over the deceleration.
v1²-v0²=2aS
v1=final velocity (0 m/s)
v0=initial velocity (20 m/s)
S=distance travelled (100 m)
solve for
a=acceleration (negative because it's a deceleration)
Use Newton's second law
F=ma
m=mass
F=average (uniform) force over the deceleration.
Answered by
Mag
using V2=U2+2aS
a=V2_U2/2S=20*20/2*100=400/200=2m/s2
F= ma
F=800*2=1600N
a=V2_U2/2S=20*20/2*100=400/200=2m/s2
F= ma
F=800*2=1600N
Answered by
Pretty
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Answered by
Favour
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