1
NEET 2021
+4
-1
A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively -
A
$${S \over 4},\sqrt {{{3gS} \over 2}}$$
B
$${S \over 4},{{3gS} \over 2}$$
C
$${S \over 4},{{\sqrt {3gS} } \over 2}$$
D
$${S \over 2},{{\sqrt {3gS} } \over 2}$$
2
NEET 2021
+4
-1
Water falls from a height of 60m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? (g = 10 m/s2)
A
7.0 kW
B
10.2 kW
C
8.1 kW
D
12.3 kW
3
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
4
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
$${5 \over 4}D$$
EXAM MAP
Medical
NEET