1
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

An object falls from a height of $$10 \mathrm{~m}$$ 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:

A
$$7.5 \mathrm{~m}$$
B
$$10 \mathrm{~m}$$
C
$$2.5 \mathrm{~m}$$
D
$$5 \mathrm{~m}$$
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1

At any instant of time $$t$$, the displacement of any particle is given by $$2 t-1$$ ($$\mathrm{SI}$$ unit) under the influence of force of $$5 \mathrm{~N}$$. The value of instantaneous power is (in $$\mathrm{SI}$$ unit):

A
10
B
5
C
7
D
6
3
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

A particle moves with a velocity $$(5 \hat{i}-3 \hat{j}+6 \hat{k}) ~\mathrm{ms}^{-1}$$ horizontally under the action of constant force $$(10 \hat{\mathrm{i}}+10 \hat{\mathrm{j}}+20 \hat{\mathrm{k}}) \mathrm{N}$$. The instantaneous power supplied to the particle is :

A
$$200 \mathrm{~W}$$
B
Zero
C
$$100 \mathrm{~W}$$
D
$$140 \mathrm{~W}$$
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The potential energy of a long spring when stretched by $$2 \mathrm{~cm}$$ is U. If the spring is stretched by $$8 \mathrm{~cm}$$, potential energy stored in it will be :

A
4U
B
8U
C
16U
D
2U
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