ExamVeda
Login
Home

Work, Energy and Power MCQ question and answer with solution | Physics Gk MCQs

Learn Work, Energy and Power MCQ Questions and answers with easy and logical explanations in Physics Gk . Work, Energy and Power MCQ question provides all type of technical mcq questions which is important for SSC-CGL, UPPSC, NDA, CDS and all govt examinations Page-7 section-1

Each section contains 100 MCQs on Work, Energy and Power .
61
Rate of doing work is called?
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
62
A photoelectric cell converts
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
63
Force/acceleration?
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
64
The work done by an object is 56 J and applied force on object is 7 N. Find the displacement.
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
65
Which of the following is the effect of balanced force applied on an object?
Discuss
Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
66
The mass of an object is 85 kg and the velocity is 60 ms-1. Find the momentum of the object.
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
67
A person does 1000J of work in 2s. What was the energy he spent?
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
68
In the correct of Ocean Energy Conversion, 'T' in OTEC stands for
Discuss
Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
69
If an object not moving after applying a force, then we can say that-
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
70
What will be the mass of the girl weighing 450 N?
Discuss
Answer & Solution
Answer: Option D
Solution:
Weight is the gravitational force acting on an object and is related to mass by the formula:

Weight (W) = Mass (m) × Acceleration due to gravity (g)

Where:

W = 450 N (Weight of the girl)

g = 9.8 m/s² (Standard acceleration due to gravity)

m = ? (Mass of the girl)

Rearranging the formula:

Mass (m) = Weight (W) ÷ g

Substituting the given values:

m = 450 ÷ 9.8 ≈ 45.9 kg

Therefore, the mass of the girl is approximately 45.9 kg.

Remember: Mass is measured in kilograms (kg) and remains the same everywhere, whereas weight is measured in newtons (N) and depends on the value of gravitational acceleration. Therefore, a person can have the same mass but different weights on different planets.