Question

a carhaving the mass of 2000kg moving with an acceleration of 2m/S2 calculate the force applied
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Answer 1

Answer:

A car of mass 2000 Kg moving with a velocity of 72 km/h is brought to rest by the application of brakes within a distance of 20 m. Find the average braking force and the time taken for the car to come to rest.

answer Given,

Mass of car, M=2000kg

Velocity, V=72×

18

5

=20ms

−1

Apply kinematic equation of motion

v

2

−u

2

=2as

0−20

2

=2a×20

a=−10ms

−2

Breaking force, F=ma=2000×10=20 kN

Apply first kinematic equation

v=u+at

t=

a

v−u

=

−10

0−20

=2 sec

Breaking force is 20 kNand time is 2sec.

this question is example of you question

Answer 2

Answer: 4000 N

Explanation: FORCE APPLIED= MASS*ACCELERATION

= F=M*A

AND THE UNIT OF FORCE CALCULATED IS ALWAYS NEWTON...