How fast should a man weighing 600N needs to run, so that his kinetic energy i

Sail E0 Webinar

Question

How fast should a man weighing $600 N$ needs to run, so that his kinetic energy is $750 J$ ? Take $g = 10 m s^{- 2}$

Options:

A .

3 m s^{- 1}

B .

4 m s^{- 1}

C .

5 m s^{- 1}

D .

6 m s^{- 1}

Answer: Option C
:
C

Given, the weight of a man, $W = 600 N$ , $g = 10 m s^{- 2}$ , kinetic energy, $K E = 750 J$
Let the mass of the man be $m$ and the velocity be $v$ .
We know, $W = m g$
So, $600 = m \times 10$
On solving we get, $m = 60 k g$
As we know, $K E = \frac{1}{2} m v^{2}$
So, $750 = \frac{1}{2} \times 60 \times v^{2}$
or, $v = 5 m s^{- 1}$

Was this answer helpful ?

Next Question

Submit Solution

More Questions on This Topic :

Question 1. A ball, when kept on a spring attains a certain height after it is compressed and released. For which o....ball, maximum of his energy is required to compress the spring?

Question 2. The mechanical energy in a system remains constant. ....

Question 3. A box of mass 2 kg is lifted diagonally from point A to point B as shown in the given figure. Given that the acceleratio....what is the gravitational potential energy gained by the box?

Question 4. A loader applied 150 N of force to lift a stone and 1250 J of work was done by it. How far was the rock lift....far was the rock lifted during the application of force?

Question 5. Hulk tried to move the wall of a fortress, but unfortunately he was unable to do it. But he applied a very large amoun....of force to do so, hence work done is positive.

Question 6. Moving train has complete mechanical energy in the form of potential energy. ....

Question 7. A child is moving on a skateboard at the speed of 2 ms−1. After a force acts on him, his speed becomes ....child, given the mass of the child is 20 kg.

Question 8. An object is falling from a terrace of height 20m. At what point does it have maximum kinetic energy? ....

Question 9. Which of the following are forms of mechanical energy? ....

Question 10. A man lifts a luggage of 10kg from the ground and puts it on his head 1.7m above the ground. Calculate work done by hi....by him on the luggage. Take acceleration due to gravity=10ms−2.

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Chapter 3.1 : Overview of Finance & Accounts Department Chapter 3 : Finance & Accounts SAIL E0 - GFM 2024

Chapter 2.1 : Overview Chapter 2 : Materials Management SAIL E0 - GFM 2024

Chapter 1.1 : Personnel Functions- An overview Chapter 1 : Personnel Management SAIL E0 - GFM 2024

GPOE / GPA Combined 1 Free CBT Mock Test SAIL E0 2024

CBT Mixed Test 1 GPOE/GPA SAIL E0 2024