Dynamics

Dynamics
Weight is measured by a
beam balance
spring balance
screw gauge
physical balance
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Dynamics
The friction is reduced by
making sliding surfaces smooth
lubricating the surface
using ball bearings
all of above
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Dynamics
The momentum of an isolated system always remains
constant
zero
high
low
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Dynamics
At high speeds the friction is
increased
decreased
s zero
infinite
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Dynamics
If the bullet of mass 20 g is fired from a gun of 5 kg with a velocity of 100 ms^-1 then recoil of the gun is
0.4 ms^-1
-0.4 ms^-1
1 ms^-1
2 ms^-1
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Dynamics
If two masses 5.2 kg and 4.8 kg are attached to the ends of inextensible strings passed over a frictionless pulley then the acceleration of the system is
0.7 ms^-2
0.4 ms^-2
0.5 ms^-2
1 ms^-1
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Dynamics
When a net force act on a body, it produces acceleration in the body in the direction of the net force which is directly proportional to the net force acting on the body and inversely proportional to its mass. This statement is called
newton’s 2nd law of motion
newton’s 1st law of motion
newton’s 3rd law of motion
law of momentum
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Dynamics
The body jumps out of a moving van. There is a danger for him to fall in
towards the moving van
away from the van
direction of motion
under the van
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Dynamics
The opposing force in motion is called
inertia
resistance
friction
acceleration
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Dynamics
The motion of an object in a circular path is called
circular motion
translatory motion
vibratory motion
linear motion
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