EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Center of Mass, Momentum and Collision>BITSAT 2019>Q 1

MEDIUM

BITSAT

IMPORTANT

Earn 100

A particle $X$ of mass $m$ and initial velocity $u$ collides with another particle $Y$ of mass $\frac{3 m}{4}$ , which is at rest. The collision is head-on and perfectly elastic. The ratio of de-Broglie wavelengths $λ_{Y}$ and $λ_{X}$ after the collision is,

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Important Questions on Center of Mass, Momentum and Collision

MEDIUM

BITSAT

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Center of Mass, Momentum and Collision>BITSAT 2019>Q 2

The escape velocity from the surface of earth is

v_{e} .

A body is projected with velocity

3 v_{e} .

With what constant velocity will it move in the inter planetary space?

HARD

BITSAT

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Center of Mass, Momentum and Collision>BITSAT 2018>Q 3

An object of mass

5 kg

is projected with a velocity

20 m s^{- 1}

at an angle

60 °

, to the horizontal. At the highest point of its path, the projectile explodes and breaks up into two fragments of masses

1 kg

and

4 kg .

The fragments separate horizontally after the explosion, which releases internal energy such that the

K E

of the system af the highest point is doubled. The separation between the two fragments when they reach the ground is

MEDIUM

BITSAT

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Center of Mass, Momentum and Collision>BITSAT 2018>Q 4

A trolley having mass of

200 kg

moves with uniform speed of

36 {kmh}^{- 1}

on a frictionless track. A child of mass

20 kg

runs on the trolley from one end to the other (

10 m

away) with a speed of

4 m s^{- 1}

relative to the trolley in a direction opposite to its motion and ultimately jumps out of the trolley. With how much velocity has the trolley moved from the time the child begins to run?