JEE WhatsApp Group
Sign in
Please select an account to continue using cracku.in
↓ →
JEE WhatsApp Group
Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
A spherical body of mass 2 kg 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.
Correct Answer: 40
Given: $$m=2$$ kg, $$KE=10000$$ J at $$t=5$$ s, starts from rest.
$$\frac{1}{2}mv^2=10000 \Rightarrow v^2=10000 \Rightarrow v=100$$ m/s.
$$a = v/t = 100/5 = 20$$ m/s$$^2$$. $$F = ma = 2 \times 20 = 40$$ N.
Educational materials for JEE preparation
Ask our AI anything
AI can make mistakes. Please verify important information.
AI can make mistakes. Please verify important information.