EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Kinematics>Assam CEE 2016>Q 7

MEDIUM

Assam CEE

IMPORTANT

Earn 100

The position of a particle as a function of time is given by $\vec{r} (t) = A \cos ω t \hat{i} + B \sin ω t \hat{j}$ where $A$ and $B$ are two real positive constants with $A > B$ . The orbit of the particle looks like-

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Important Questions on Kinematics

MEDIUM

Assam CEE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Kinematics>Assam CEE 2016>Q 8

The equation of motion of a body is,

\frac{d v (t)}{d t} = 9 - 3 v (t)

where,

v (t)

is the speed (in

m s^{- 1}

) at time

t

(in second). If the body was at rest at

t = 0

, then which of the following is correct?

MEDIUM

Assam CEE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Kinematics>Assam CEE 2016>Q 9

The initial velocity of a projectile is

(2 \hat{i} + 4 \hat{j}) m s^{- 1}

, where

\hat{i}

and

\hat{j}

are along horizontal and vertical directions, respectively. For

g = 10 m s^{- 2}

, the equation of the trajectory will be,

HARD

Assam CEE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Kinematics>Assam CEE 2016>Q 10

A mobile phone of mass

100 g

falls from the hand of a person through the window of a train. The train is accelerating at

1 m s^{- 2}

and just

20 s

have passed since it left the station from standstill. If the window is

2 m

above the ground. With what kinetic energy will the phone will hit the ground?

(g = 10 m s^{- 2})

HARD

Assam CEE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Kinematics>Assam CEE 2016>Q 11

A ball of mass $m$ is thrown upward with a velocity $v$ . The air exerts an average resisting force $F$ . The velocity with which the ball returns to the thrower is