# Tag Archive: post

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Sep 13

## Problem from relative velocity

A Boat covers certain distance between two spots in a river taking t1 hrs going downstream and t2 hrs going upstream. What time will be taken by boat to cover same distance in still water?
posted by STUTI
Answer:
Incoming search terms:relative velocity...

**Permanent link to this article: **http://www.plustwophysics.com/problem-from-relative-velocity-2/

Sep 13

## Collection of Problems received from Class 12 Physics

These problems were posted by Geena. Hope that we will be able to post the answers to these questions soon; each in a separate post. By the time visitors can attempt to post their answers as comments to this post. (Only selected posts will be published)
Please note that the answers are not published until the [...]

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Sep 11

## 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 ...

**Permanent link to this article: **http://www.plustwophysics.com/a-simple-numerical-on-momentum/

Sep 11

## 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 ...

**Permanent link to this article: **http://www.plustwophysics.com/a-simple-numerical-on-momentum-2/

Sep 10

## Numerical Problem from Friction

“The friction coefficient between a road and the tyre of a vehicle is 4/3.find the maximum incline the road may have so that once hard brakes are applied and the wheel starts skidding,the vehicle going down at a speed of 10m/s is stopped within 5m”...

**Permanent link to this article: **http://www.plustwophysics.com/numerical-problem-from-friction/

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