Question

What is the acceleration of the body shown in the picture?
(A) 10/8 m/s²
(B) 20/8 m/s²
(C) 17/8 m/s²
(D) 0 m/s²​

Answer 1

Answer:

(D) 0 m/s²

Explanation:

To determine the acceleration first we need to calculate the net force acting on the body. This net force is :

F(net) = -7N -3N + 10N = 10N - 10N = 0 Newton.

Thus, F(net) = 0

Now, F(net) = (mass)*(acceleration) = m*a

Hence,

F(net) = ma = 0

=> a = 0

Thus, acceleration produced = 0 m/s²

Answer 2

D) 0 m/s²

Given that,

The acceleration a=8m/s

2

Initial velocity u=0m/s

We know that,

The displacement in the nth second

=u+a(n−

2

1

)

Now, the displacement in 5th second

=0+8(5−

2

1

)

=36m

Hence, the distance covered by it in fifth second is 36 m

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