Question

help me in this!!!
please!

Answer 1

Inertia is the resistance of the object to any change in its motion, including a change in direction. An object will stay still or keep moving at the same speed and in a straight line, unless it is acted upon by an external unbalanced force.

Answer 2

Inertia is a property of matter that causes it to resist changes in velocity (speed and/or direction). According to Newton's first law of motion, an object with a given velocity maintains that velocity unless acted on by an external force. Inertia is the property of matter that makes this law hold true.

Final velocity=0(because brakes are applied),

Initial velocity=54km/h=54×5/18

=15m/s,

Mass=1000kg,

Time to get stopped=5sec

Force=?

Acceleration=(v-u)/t

Acceleration=(0-15)/5

Acceleration=-3m/s^2

Force=mass×acceleration

Force=1000kg×-3m/s^2

Force=-3000N