New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Work Energy and Power question

2025 · Q140

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
NEET
Physics
Work Energy and Power
2025 · Q140

Work Energy and Power question

2025 · Q140

NEETPhysicsWork Energy and PowerMCQ+4 / −1

The kinetic energies of two similar cars $A$ and $B$ are 100 J and 225 J respectively. On applying breaks, car $A$ stops after 1000 m and car $B$ stops after 1500 m . If $F_A$ and $F_B$ are the forces applied by the breaks on cars $A$ and $B$ respectively, then the ratio of $\frac{F_A}{F_B}$ is

A
$\frac{1}{3}$
B
$\frac{1}{2}$
C
$\frac{3}{2}$
D
$\frac{2}{3}$

More from Work Energy and Power

A bob of heavy mass $m$ is suspended by a light string of length $/$ . The bob is given a horizontal velocity $v_{0}$ as shown in figure. If the string gets slack at some point $P$ making an angle $θ$ from the horizontal, the ratio of… Includes diagram2025 · MCQ
At any instant of time $t$ , the displacement of any particle is given by $2 t - 1$ ( $SI$ unit) under the influence of force of $5 N$ . The value of instantaneous power is (in $SI$ unit):2024 · MCQ
An object moving along horizontal $x$ -direction with kinetic energy $10 J$ is displaced through $x = (3 \hat{i}) m$ by the force $F = (- 2 \hat{i} + 3 \hat{j}) N$ . The kinetic energy of the object at the end…2024 · MCQ
An object falls from a height of $10 m$ above the ground. After striking the ground it loses $50%$ of its kinetic energy. The height upto which the object can rebounce from the ground is:2024 · MCQ
A particle moves with a velocity $(5 \hat{i} - 3 \hat{j} + 6 \hat{k}) ms^{- 1}$ horizontally under the action of constant force $(10 \hat{i} + 10 \hat{j} + 20 \hat{k}) N$ . The instantaneous power…2023 · MCQ
The potential energy of a long spring when stretched by $2 cm$ is U. If the spring is stretched by $8 cm$ , potential energy stored in it will be :2023 · MCQ
The restoring force of a spring with a block attached to the free end of the spring is represented by2022 · MCQ
An electric lift with a maximum load of 2000 kg (lift + passengers) is moving up with a constant speed of 1.5 ms $-$ 1. The frictional force opposing the motion is 3000 N. The minimum power delivered by the motor to the lift in watts is : (g…2022 · MCQ