A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 second. The force acted on the body is ______ N. [2023]

Question

A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 second. The force acted on the body is ______ N. [2023]

Smart Achievers · Accepted Answer

(40)

$\frac{1}{2} \times 2 \times v^{2} = 10000 \Rightarrow v = 100 m/s$

$\Rightarrow v = a t = a \times 5 = 100 \Rightarrow a = {20 m/s}^{2}$

$F = m a = 2 \times 20 = 40 N$

Solution

Q.
A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 second. The force acted on the body is ______ N. [2023]

Ans.
(40)

$\frac{1}{2} \times 2 \times v^{2} = 10000 \Rightarrow v = 100 m/s$

$\Rightarrow v = a t = a \times 5 = 100 \Rightarrow a = {20 m/s}^{2}$

$F = m a = 2 \times 20 = 40 N$

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Solution

Q. A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 second. The force acted on the body is ______ N. [2023]

Ans. (40) 12×2×v2=10000⇒v=100 m/s ⇒ v=at=a×5=100 ⇒ a=20 m/s2 F=ma=2×20=40 N

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Q.
A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 second. The force acted on the body is ______ N. [2023]

Ans.
(40)

$\frac{1}{2} \times 2 \times v^{2} = 10000 \Rightarrow v = 100 m/s$

$\Rightarrow v = a t = a \times 5 = 100 \Rightarrow a = {20 m/s}^{2}$

$F = m a = 2 \times 20 = 40 N$