Initial velocity (u) = 0
Final velocity (v) = 180 m s -1
Time (t) = 0.05 h or 180 s
Acceleration (a) = v-u\over t
= 180-0\over 180
= 180\over 180 = 1 m s -2
Hence, acceleration of the body is 1 m s -2.
Question
A car starting from rest acquires a velocity of 180 m s-1 in 0.05 h. Find the acceleration.
WhatsApp
💡 Some Related Questions
A space craft flying in a straight course with a velocity of 75 km s-1 fires its rocket motors for 6.0 s. At the end of this time, its speed is 120 km s-1 in the same direction. Find – (i) the space craft’s average acceleration while the motors were firing (ii) the distance travelled by the space craft in the first 10 s after the rocket motors were started, the motors having been in action for only 6.0 s.
Open Answer »A car travels with a uniform velocity of 25 m s-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s. Find — (i) the distance which the car travels before the brakes are applied, (ii) the retardation and (iii) the distance travelled by the car after applying the brakes.
Open Answer »