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Posted by Adarsh Singh 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
- The period of the hour hand of clock, T = 12 hours = {tex}12 \times 60 \times 60{/tex} seconds
Therefore, Angular velocity of the hour hand of a clock, {tex}\omega=\frac{2 \pi}{T}=\frac{2 \times 3.14}{12 \times 60 \times 60}{/tex}= 1.45 {tex}\times{/tex} 10-4 rad s-1
- The period of the second hand of clock, T = 1 minute = 60 seconds
Therefore, Angular velocity of the second hand of a clock {tex}\omega=\frac{2 \pi}{T}=\frac{2 \pi}{60}{/tex}= 0.105 rad s-1
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Impulse of a force is defined as the product of force and the time for which force is acting.
Priyansh Goyal 6 years, 5 months ago
Yogita Ingle 6 years, 5 months ago
Impulse
- Impulse is defined as a force multiplied by time it acts over.
- For example: Tennis racket strikes a ball, an impulse is applied to the ball. The racket puts a force on the ball for a short time period.
Ashish Singh 6 years, 5 months ago
Posted by Harshit Kumar 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Impulse of a force is defined as the product of force and the time for which force is acting.
Yogita Ingle 6 years, 5 months ago
Impulse
- Impulse is defined as a force multiplied by time it acts over.
- For example: Tennis racket strikes a ball, an impulse is applied to the ball. The racket puts a force on the ball for a short time period.
Posted by Niharika Pal 6 years, 5 months ago
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Posted by Muskan Jain 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
According to this law a body at rest will remain at rest and a body in motion will remain in motion at the same speed and in the same direction unless acted upon by an external force. There are great examples of this law in sports such as starting in rowing, starting in sprinting, starting in throwing the hammer. Basically if an object is in motion, it remains in motion unless something or some external force stops it. The external force may be gravitational force, the surface of playing field or a defensive player etc.
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Rajat Barwar 6 years, 5 months ago
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Ashish Singh 6 years, 5 months ago
Yogita Ingle 6 years, 5 months ago
Relative Velocity
This is the velocity of an object relative to some other object which might be stationary, moving slowly, moving with same velocity, moving with higher velocity or moving in opposite direction.
If initial position of two objects A and B are xA (0) and xB (0), the position at time t will be,
- xA (t) = xA (0) + vA t
- xB (t) = xB (0) + vB t
- Displacement from object A to B, [ xB (0) - xA (0) ] + (vB -vA)t
- Velocity of B relative to A = vBA = vB – vA
- Velocity of A relative to B = vAB = vA – vB
Posted by Sumit Kumar 6 years, 5 months ago
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