A 400 g ball swings in a vertical cirde at the end of
1 answer:
Answer:
15.10m/s
Explanation:
The mass of the ball(m)=400g = 0.4kg
The radius of the string is(r)=15m
The tension in the string is(T)=10N
The acceleration due to gravity =
The tension in the string when the body is at the bottom is given by
To find the speed of the ball, we make v the subject of the formula
Therefore,
The speed of the ball = 15.10m/s
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Answer:
Speed of water at the top of fall = 5.40 m/s
Explanation:
We have equation of motion
Here final velocity, v = 26 m/s
a = acceleration due to gravity
displacement, s = 33 m
Substituting
Speed of water at the top of fall = 5.40 m/s
Before solving this problem first we have to understand the basic of velocity and speed.The speed is a scalar quantity which means the rate of change of distance covered by a particle .As the distance traveled is a scalar quantity as it has no specific directions,so is the speed.It has simply magnitude.
then we have to understand the velocity.Velocity is a vector quantity.IT is defined as the rate of change displacement of the particle or we may say the speed in a given direction .As we know that displacement is the minimum distance traveled by a particle which is nothing else except the straight line joining two points,so it has direction.hence velocity has a magnitude as well as direction.one has remember that the magnitude velocity is always smaller than or equal to the speed
so the answer will be DIRECTION i.e velocity indicates the direction of motion .