A rear view mirror used in a bus has a radius of curvature 3.5 m. If the driver of the bus locates a car at 10.0m behind the bus, find the position, nature and size of the image of the car. Ans: f = r/2=-1.75 m u=-10m v=?

# Tag: car

## A Numerical Problem from Kinematics

A car starts motion from rest at uniform acceleration of 2m/sec 2 for 3 seconds, and then it maintains a constant speed for 2 seconds.Then the breaks are used to decelerate the car uniformly to rest during a time of 3 seconds. Draw the graph representing the journey of the car then calculate 1)the maximum speed…… Continue reading A Numerical Problem from Kinematics

## More problems coming in; Try to answer now!

Stuti posted these:

a particle is thrown with any velocity vertically upward. the distance traveled by particle in last sec of ascent is 1)g 2)g/2 3)g/4 4)cant be calculated

a ball is dropped from a bridge of 122.5 metre above a river. after ball h…

## A simple numerical on momentum

Car mass is 1200 kg moving velocity is 108 km/hr. On applying brakes velocity reduced to 36 km/hr. Find change in momentum?

(posted by Aditi)

Answer: m=1200 kg

u=108 x 5/18=30m/s

v=36×5/18=10m/s

Change in momentum = m(v-u) = 1200 x (30-10)=1200 …

## A simple numerical on momentum

Car mass is 1200 kg moving velocity is 108 km/hr. On applying brakes velocity reduced to 36 km/hr. Find change in momentum?

(posted by Aditi)

Answer: m=1200 kg

u=108 x 5/18=30m/s

v=36×5/18=10m/s

Change in momentum = m(v-u) = 1200 x (30-10)=1200 …

## Practice problems for class 9 SA1

Try to solve these problems, it will help you score good marks in Physics in first summative assessment. Calculate the force required to be imparted to a car to give it a velocity of 30 m/s in 10 s. The mass of the car is 1500 kg. For how long should a force of 200N…… Continue reading Practice problems for class 9 SA1

## Vector Addition Problem – A Spy Report

A spy report about a suspended car reads as follows.”the car moved 2.00 km towards east,made a perpendicular left turn, ran for 500 m, made a perpendicular left turn, ran for 4.00 km and stopped”. Find the displacement of the car. Answer: 2061.5 m https://www.facebook.com/groups/askphysics/ Incoming search terms:spy vectorvectorvector addition problemvectors in physics csun […]