NEET | 2017Basic Maths and Units and DimensionsHard

Question

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 meters and t in seconds. The acceleration of the particle at t = 2s is :-

Options

A.

5 m/s2

B.

- 4 m/s2

C.

- 8 m/s2

D.

0

Solution

vx = 5 - 4t, vy = 10
ax = - 4, ay = 0
a→=axi→+ayj→
a→=-4i→m/s2

Create a free account to view solution

View Solution Free
Topic: Basic Maths and Units and Dimensions·Practice all Basic Maths and Units and Dimensions questions

More Basic Maths and Units and Dimensions Questions

If the velocity of a particle is υ = At + Bt2, where A and B are constants, then the distance travelled by it betwe...Two concentric shells of masses M1 and M2 are having radii r1 and r2. Which of the following is the correct expression f...A string of length 1m is fixed at one end and carries a mass of 100 g at the other end. The string makes (2/π) revo...The angle of incidence for a ray of light at a refracting surface of a prism is 45o. The angle of prism is 60o. Ifthe ra...Which one of the following quantities has not been expressed in proper units...