How to fight( this is not for me)
2 answers:
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Answer:
The parachuter is falling at a speed of 31.667 meters per second.
Explanation:
Given that parachuter falls at constant speed and travelled distance and time are known, the unknown is speed, measured in meters per second, which is obtained by the following kinematic expression:
Where:
- Travelled distance, measured in meters.
- Time, measured in seconds.
If and
, the speed of the parachuter is:
The parachuter is falling at a speed of 31.667 meters per second.
Answer:
Magnitude of change in momentum = 4.65 kg.m/s
Magnitude of impulse = 4.65 kg.m/s
Magnitude of the average force applied by the bat = 1550 N
Explanation:
Mass of the cricket ball, m = 0.155 kg
Initial velocity of the ball, u = 35.0 m/s
final velocity of the ball after hitting the bat, v = 65.0 m/s
Time of contact, t = 2.00 ms = 2.00 × 10⁻³ s
Now,
Magnitude of change in momentum = Final momentum - Initial momentum
or
Magnitude of change in momentum = ( m × v ) - ( m × u )
or
Magnitude of change in momentum = ( 0.155 × 65 ) - ( 0.155 × 35 )
or
Magnitude of change in momentum = 10.075 - 5.425 = 4.65 kg.m/s
Now, Magnitude of impulse = change in momentum
thus,
Magnitude of impulse = 4.65 kg.m/s
Now,
magnitude of the average force applied by the bat =
or
magnitude of the average force applied by the bat =
or
Magnitude of the average force applied by the bat = 1550 N