Answer:
The value is
Explanation:
From the question we are told that
The mass of the stone is
The radius of the circle is
The angular speed is
Generally the tension in the string is mathematically represented as
=>
=>
Power is defined as the rate at which the body is doing work:
Work is defined as displacement done by the force times that displacement:
We know that we need 62N to move the box, so when we apply this force along the path of 10m we have done:
of work.
Now we just divide that by 5s to get how much power is required:
Answer:
Hi
Explanation:
the dancers wish to increase their grip which takes advantage of the force of friction.
Answer:
When u go on a rock climbing, earth exerts gravitational force on pack in downward direction (pointing towards the center of earth).
In order to climb, you need to work against work done by gravity on the pack. Hence work done by you = work done by gravity on pack
= Force x displacement = 70 x 30 = 2100 J.
So you need to do 2100 joules of work to lift your pack.
Power is the rate of work done. Therefore power = work done by you/ time in seconds
=2100/600 =3.5 watts
hence the answers is 3.5 watts.
Answer:
B
explanation:
The car is not making a change in speed.