1
NEET 2019
+4
-1
A force F = 20 + 10y acts on a particle in y-direction where F is in newton and y in meter. Work done by this force to move the particle from y = 0 to y = 1 m is :
A
5 J
B
25 J
C
20 J
D
30 J
2
NEET 2018
+4
-1
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle of diameter AB = D. The height h is equal to
A
D
B
$${3 \over 2}D$$
C
$${7 \over 5}D$$
D
$${5 \over 4}D$$
3
NEET 2017
+4
-1
Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m s$$-$$1. Take 'g' constant with a value 10 m s$$-$$2. The work done by the (i) gravitational force and the (ii) resistive force of air is
A
(i) 1.25 j   (ii) $$-$$8.25 J
B
(i) 100 j   (ii) 8.75 J
C
(i) 10 j   (ii) $$-$$8.75 J
D
(i) $$-$$10 j   (ii) $$-$$8.25 J
4
NEET 2016 Phase 2
+4
-1
A particle moves from a point $$\left( { - 2\widehat i + 5\widehat j} \right)$$ to $$\left( {4\widehat j + 3\widehat k} \right)$$ when a force of $$\left( {4\widehat i + 3\widehat j} \right)$$ N is applied. How much work has been done by the force ?
A
8 J
B
11 J
C
5 J
D
2 J
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