Home
Class 11
PHYSICS
A car travelling with a velocity of 80 k...

A car travelling with a velocity of 80 km/h slowed down to 44 km/h in 15 s. The retardation is

A

`0.67 ms^(-2)`

B

`1 ms^(-2)`

C

`1.25 ms^(-2)`

D

`1.5 ms^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`a=("Chamge in velocity")/("Time taken")=(upsilon_(f)-upsilon_(i))/(t)` ltrgt `=((44xx(5)/(18))-(80xx(5)/(18)))/(15)=-0.67m//s^(2)`
Negative sign represents the retardation.
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PLANE

    DC PANDEY|Exercise Check point 3.4|15 Videos

  • MOTION IN A PLANE

    DC PANDEY|Exercise Check point 3.5|25 Videos

  • MOTION IN A PLANE

    DC PANDEY|Exercise Check point 3.2|10 Videos

  • MOTION

    DC PANDEY|Exercise Medical entrances gallery|19 Videos

  • PROJECTILE MOTION

    DC PANDEY|Exercise Level - 2 Subjective|10 Videos

Similar Questions

Explore conceptually related problems

A car travelling at 20 km/h speeds up to 6 km/h in 6 seconds. What is its acceleration ?

A car travelling with a velcity of 60 km h^(-1) on a straight road is ahead of a motor cycle travelling with a speed of 76 km h^(-1) . How would the relative velcity be alterd if motor cucle is ahead of car?

A car moving with a velocity of 40 km/h can be stopped by brakes after travelling at least 5 m. If same car moves at a speed of 80 km/h the minimum stopping distance is

A car is moving with a velocity of 60km//h due east and a train is moving with a velocity of 80km//h due south . For a passenger sitting inside the train , what is the velocity of car appearing to him ?

A car travels 1/3 of the distance on a straight road with a velocity of 10 km/h, next one-third with a velocity of 20 km/h and the last one-third with a velocity of 60 km/h. Then the average velocity of the car (in km/h) during the whole journey is

Assume that you are travelling at a speed of 90 km/h in a small car with a mass of 1050 kg. If the uncertainty in the velocity of the car is 1% (Deltav =0.9 km/h) , what is the uncertainty (in meters) in the position of the car ?

A car is travelling at a velocity "10 km h"^(-1) on a straight road. The driver of the car throws a parcel with a velocity 10sqrt2km h^(-1) with respect to the car, when the car is passing by a man standing on the side of the road. If the parcel is to reach the man, the direction of throw makes the following angle with the direction of motion of the car

A car moves with a velocity 2.24 km/h in first minute, with 3.60 km/h in the second minute and with 5.18 km/h in the third minute. Calculate the average velocity in these three minutes.

A car travels half the distanace with constant velocity 30 km //h and another half with a constant velocity of 40 km //h along a straight line. The average velocity of car in km//h is.