Dynamics

Dynamics
A body continues its state of rest or of uniform motion in a straight line provided no net force acts on it, 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
Author: rikazzz Comment
Dynamics
Cream separator acts on the same principle of
centrifuge machine
pendulum
floatation
screw gauge
Author: rikazzz Comment
Dynamics
According to newton’s 2nd law of motion, with mass ‘m’, velocity ‘v’ and radius ‘r’ the centripetal force is equal to
mv² ×r
(mv²)⁄r
mv² + r
mv² – r
Author: rikazzz Comment
Dynamics
The ratio of the force of limiting friction to normal reaction is
zero
constant
greater than 1
less than 2
Author: rikazzz Comment
Dynamics
A force of 15 N moves a body with an acceleration of 3 ms⁻². Its mass is
10 kg
8 kg
12 kg
5 kg
Author: rikazzz Comment
Dynamics
A cyclist of mass 30 kg exerts a force of 250 N to move his cycle. The acceleration is 4 ms⁻². The force of friction between the road and tires will be
120 N
130 N
150N
115 N
Author: rikazzz Comment
Dynamics
The force of friction between a rolling body and a surface over which it rolls is called
sliding friction
rolling friction
limiting friction
vertical friction
Author: rikazzz Comment
Dynamics
A force acting on a body of mass 7 kg produces an acceleration of 10 ms⁻². The acceleration that the same force will produce in a body of mass 9 kg will be
5 ms⁻²
6 ms⁻²
6.5 ms⁻²
7.7 ms⁻²
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Dynamics
Mass is measured by a
beam balance
screw gauge
physical balance
Vernier calipers
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Dynamics
The branch of mechanics that deals with the study of the motion of an object and the cause of its motion are called
kinematics
dynamics
trinamics
friction
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