Generally it is said “Normal reaction always acts perpendicular to the surface of contact” :
Normal reaction force is always normal ( Perpendicular ) to the surface.
If a fly collides with the wind shield of a fast moving bus which experiences an impact force with a larger magnitude :
From Newton's third law of motion both bus and fly will experience equal force in opposite direction.
If action force is gravitational force, then reaction force :
Action and Reaction forces are of same nature.
Figure shows an estimated force-time graph for a base ball struck by a bat from this curve determine impulse delivered to the ball.
Area bounded by force time graph with time axis represents impulse. Area of triangle in the figure is ⇒Impulse = ½×2 ×1800 = 1800 kg m/sec
In the motion picture ‘It happened one night’ (columbia pictures, 1934), Clark ceable in
standing inside a stationary bus in front of the claudetle colbert, who is seated, the bus suddenly starts moving forward and clark fall into claudetters lap which of following explains this phenomena best :
Due to inertia of rest clark want to remain at rest.
Acceleration of the block is
Net force acting on the object is 10 N.
so, acceleration a = F/m = 10 N/10 kg= 1 m/s²
A force F = (3ˆi + 4ˆj +12kˆ ) N produces an acceleration of 1 m/sec² in a body, find the mass of the body :
Given force is F = (3ˆi + 4ˆj +12kˆ ) N , magnitude of force is
⇒F²= (3²+4²+12²) so, F = 13 N
From Newton's second law of motion F= m.a
⇒ 13 N = m.1 so, m=13 kg
Block A of mass 4 kg is to be kept at rest against a smooth vertical wall by applying a force F as shown in figure. The force required is (g = 10 m/s²)
In the given arrangement, the normal force applied by block on the ground is
The value of \( \frac{T_{3}}{T_{1}} \) is
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