A body of mass 10 kg is moving with a constant velocity of 10 m/s. When a constant force acts for 4 s on it, it moves with a velocity 2 m/s in the opposite direction. The acceleration produced in it is

Question

A body of mass 10 kg is moving with a constant velocity of 10 m/s. When a constant force acts for 4 s on it, it moves with a velocity 2 m/s in the opposite direction. The acceleration produced in it is (A) 3 m / s 2 (B) -3 m / s 2 (C) 0.3 m / s 2 (D) 0.03 m / s 2

Tardigrade Admin · Accepted Answer

According to equation of motion v=u+a t ⇒ -2=10+a × 4 ∴ a=-3 m/s 2

Q. A body of mass $10 k g$ is moving with a constant velocity of $10 m / s .$ When a constant force acts for $4 s$ on it, it moves with a velocity $2 m / s$ in the opposite direction. The acceleration produced in it is

$3 m / s^{2}$

$- 3 m / s^{2}$

$0.3 m / s^{2}$

$0.03 m / s^{2}$

According to equation of motion
$v = u + a t$
$\Rightarrow - 2 = 10 + a \times 4$
$∴ a = - 3 m / s^{2}$

Q. A body of mass 10kg is moving with a constant velocity of 10m/s. When a constant force acts for 4s on it, it moves with a velocity 2m/s in the opposite direction. The acceleration produced in it is

3m/s2

−3m/s2

0.3m/s2

0.03m/s2