Question

a bus with passengers is moving at a speed of 54 km / h . Brakes are applied at a constant force of 6000N , and it stops after 5 s . the mass of the bus including its passengers is​

Answer 1

Force=mass*acceleration

f=m×

t

v−u

f=1000×

4

0−108×

18

5

=1000×(−7.5)

∴f=−7500N

opposing force is denoted by negative sign.