Question

A body is moving along a straight line with uniform acceleration 'a'. The displacement of the body in n^th second is given as 2S_n = 20 + 5(2n - 1) 

1. The initial velocity of the body is 

1) 5 m/s 

2) 10 m/s 

3) 15 m/s 

4) 20 m/s 

2. The acceleration of the body is 

1) 10 ms^-2 

2) 20 ms^-2 

3) 2.5 ms^-2 

4) 5 ms^-2

3. The distance travelled in 10^th sec is 

1) 57.5 m 

2) 32.5 m 

3) 23.5 m

4) 12.5 m

Answer 1

1. 2) 10 m/s

2. 3) 2.5 ms^-2 

3. 1) 57.5 m