Mechanics Practice Questions

JEE · Physics · 1273 free MCQs with instant results and detailed explanations.

1273
Total
279
Easy
508
Medium
486
Hard

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Topics in Mechanics

Work Energy Power 208
Rotational Motion 330
Gravitation 313
Newton's Laws 209
Kinematics 213

Sample Questions from Mechanics

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
An object is thrown vertically upwards with an initial velocity of 20 m/s. What is the maximum height it reaches? (Take g = 9.8 m/s²)
A. 20.4 m
B. 15.2 m
C. 10.2 m
D. 25.6 m
Show Answer & Explanation
Correct Answer: A
Using the formula h = (u²)/(2g), where u = 20 m/s and g = 9.8 m/s², we calculate h = (20²)/(2*9.8) = 20.4 m.
Q2
Easy
A ball is thrown horizontally from a height of 10 m. How long will it take to hit the ground? (Take g = 9.8 m/s²)
A. 1.43 s
B. 1.25 s
C. 0.5 s
D. 2 s
Show Answer & Explanation
Correct Answer: A
Using the formula for free fall, t = √(2h/g), where h = 10 m and g = 9.8 m/s², we find t = √(2*10/9.8) ≈ 1.43 s.
Q3
Easy
If a cyclist travels at a uniform speed of 15 m/s for 10 seconds, what distance does he cover?
A. 150 m
B. 100 m
C. 200 m
D. 75 m
Show Answer & Explanation
Correct Answer: A
Using the formula distance = speed × time, we calculate distance = 15 m/s × 10 s = 150 m.
Q4
Medium
A ball is thrown vertically upwards with a speed of 15 m/s. How long will it take to reach the highest point?
A. 1.5 s
B. 2.0 s
C. 3.0 s
D. 4.0 s
Show Answer & Explanation
Correct Answer: A
Time to reach max height is given by t = u/g. Here, u = 15 m/s, g = 9.8 m/s².
Q5
Medium
Which of the following is true for a body moving with uniform velocity?
A. Acceleration is zero
B. Distance is equal to displacement
C. Speed varies
D. Direction changes constantly
Show Answer & Explanation
Correct Answer: A
For uniform velocity, acceleration is zero, meaning speed and direction remain constant.
Q6
Medium
A cyclist travels 30 m east then 40 m north. What is the magnitude of the resultant displacement?
A. 50 m
B. 70 m
C. 40 m
D. 30 m
Show Answer & Explanation
Correct Answer: A
Using Pythagoras theorem: Resultant displacement = √(30² + 40²) = 50 m.
Q7
Medium
A stone is dropped from a height of 20 m. How long does it take to hit the ground? (g = 9.8 m/s²)
A. 2.0 s
B. 1.5 s
C. 1.0 s
D. 3.0 s
Show Answer & Explanation
Correct Answer: A
Using the equation h = 0.5gt², solve for t. Here, h = 20 m and g = 9.8 m/s².
Q8
Hard
A cyclist travels along a circular path of radius 20 m with a constant speed. If the cyclist takes 10 seconds to complete one full lap, what is the magnitude of the centripetal acceleration experienced by the cyclist?
A. 4 m/s²
B. 8 m/s²
C. 6 m/s²
D. 10 m/s²
Show Answer & Explanation
Correct Answer: A
The speed v of the cyclist can be calculated using the formula v = 2πr/T, where T is the time period. Thus, v = 2π(20)/10 = 12.57 m/s. The centripetal acceleration a_c = v²/r = (12.57)²/20 = 4 m/s².
Q9
Hard
A particle moves in a straight line with an acceleration given by a(t) = 2t. If its initial velocity is 3 m/s at time t=0, what will be its velocity at t=3 seconds?
A. 15 m/s
B. 12 m/s
C. 9 m/s
D. 6 m/s
Show Answer & Explanation
Correct Answer: A
To find the velocity, integrate the acceleration. v(t) = ∫a(t) dt = ∫2t dt = t² + C. Given v(0) = 3, C = 3. Therefore, v(3) = 3² + 3 = 15 m/s.
Q10
Hard
A particle moves with uniform acceleration. If it travels 30 m in the first 5 seconds and 50 m in the next 5 seconds, what is its acceleration?
A. 4 m/s²
B. 5 m/s²
C. 6 m/s²
D. 7 m/s²
Show Answer & Explanation
Correct Answer: A
Using the equations of motion, we can set up equations for each segment and solve for acceleration.

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Mechanics — JEE Physics Practice Questions Online

This page contains 1273 practice MCQs for the chapter Mechanics in JEE Physics. The questions are organized by difficulty — 279 easy, 508 medium, 486 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.