Related Practice Questions :

The x and y coordinates of a particle at any time t are given by x=7t+4t2 and y = 5t, where x and y are in metre and t in seconds. The acceleration of particle at t = 5s is  

(1) Zero

(2) 8 m/s2

(3) 20 m/s2

(4) 40 m/s2

To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


A particle is moving eastwards with velocity of 5 m/s. In 10 sec the velocity changes to 5 m/s northwards. The average acceleration in this time is 

(1) Zero

(2) 12  m/s2 toward north-west

(3) 12  m/s2 toward north-east

(4) 12  m/s2 toward north-west

To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


A particle moves towards east with velocity 5 m/s. After 10 seconds its direction changes towards north with same velocity. The average acceleration of the particle is 

(1) Zero

(2) 12m/s2NW

(3) 12m/s2NE

(4) 12m/s2SW

To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


The x and y coordinates of the particle at any time are x=5t-2t2 and y=10t respectively, where x and y are in the metres and t in seconds. The acceleration of the particle at t=2s is 

(a) 0

(b) 5m/s2

(c) -4m/s2

(d)-8 m/s2

To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


A particle moves so that its position vector is given by r=cosωt ^x+sinωt ^y where w is a constant.  Which of the following is true?

(a) Velocity and acceleration both are parallel to r.

(b) Velocity is perpendicular to r and acceleration is directed towards to origin.

(c) Velocity is not perpendicular to r and acceleration is directed away from the origin.

(d) Velocity and acceleration both are perpendicular to r.

To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level: