Answer:
The net force acting on the tennis ball while it is in contact with the racquet is 50.73 N
Explanation:
The impulse-momentum theorem said that the net impulse is equal to the change of the momentum, this is:
but the net impulse is too the net force times the change in time:
so using (2) on (1) we have:
Decomposing that on x and y components:
(See figure below) with Pfx = m*vfx= m*vf*cos(15°)=(0.058kg)(40m/s)cos(15°),
Pox = -m*vox= m*vo*cos(15°)=-(0.058kg)(30m/s)cos(15°), the same analysis to Pfy and Poy gives
Pfy=(0.058kg)(40m/s)sin(15°), Poy=-(0.058kg)(30m/s)sin(15°), using those values on (3) and (4) and solving for Fy and Fx:
So the net force acting on the tennis ball while it is in contact with the racquet is:
Answer:
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Explanation:
Let n be the number of the vernier scale division which coincides with the main scale division. Rotate the vernier caliper 90° and repeat the steps 4 and 5 for measuring the internal diameter in perpendicular direction. To measure the depth, find the total reading and zero correction.
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Answer:
lubricant (decrease friction).
control production speed.
use only when required.
A system of millions or billions of stars together with gas and dust, held together by gravitational attraction
red having the frequency of 4.62 and at its limit 4.29 has the lowest frequency. It is the lowest before orange which has 5.00.