A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 text th second. The force acted on the body is N.

Question

A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 text th second. The force acted on the body is N. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

(1/2) × 2 × v2=10000 ⇒ v2=10000 ⇒ v =100 m / s ⇒ v = at = a × 5=100 ⇒ a =20 m / s 2 F = ma =2 × 20=40 N

Q. A spherical body of mass $2 k g$ starting from rest acquires a kinetic energy of $10000 J$ at the end of $5^{th}$ second. The force acted on the body is ___ $N$ .

$\frac{1}{2} \times 2 \times v^{2} = 10000$
$\Rightarrow v^{2} = 10000$
$\Rightarrow v = 100 m / s$
$\Rightarrow v = a t = a \times 5 = 100$
$\Rightarrow a = 20 m / s^{2}$
$F = ma = 2 \times 20 = 40 N$

Q. A spherical body of mass 2kg starting from rest acquires a kinetic energy of 10000J at the end of 5th second. The force acted on the body is ___N.

21​×2×v2=10000 ⇒v2=10000 ⇒v=100m/s ⇒v=at=a×5=100 ⇒a=20m/s2 F=ma=2×20=40N

Q. A spherical body of mass $2 k g$ starting from rest acquires a kinetic energy of $10000 J$ at the end of $5^{th}$ second. The force acted on the body is ___ $N$ .

$\frac{1}{2} \times 2 \times v^{2} = 10000$
$\Rightarrow v^{2} = 10000$
$\Rightarrow v = 100 m / s$
$\Rightarrow v = a t = a \times 5 = 100$
$\Rightarrow a = 20 m / s^{2}$
$F = ma = 2 \times 20 = 40 N$