Answer:
The force needed to slow down the car is, F = 67.5 N
Explanation:
Given data,
The mass of the car, m = 15 kg
The initial velocity of the car, V = 60 m/s
The final velocity of the car, v = 15 m/s
The time period of deceleration, t = 10 s
The difference in the momentum of the car is,
mV - mv = 15(60 - 15)
= 675 kg m/s
The rate of change in momentum of the car gives the force acting on it.
F = (mV - mu) / t
Substituting the values,
F = 675 / 10
= 67.5 N
Hence, the force needed to slow down the car is, F = 67.5 N
It’s D because kinetic energy is the energy of motion
Answer:c
Explanation:
When an object is performing simple harmonic motion then time period is given by measuring the time period take by object to return its initial position.
Thus we can say that it also valid for maximum position thus period is the correct is answer for this problem.
Time Period of oscillation for spring mass system is
It's exactly false because circular motion is accur's in all the universe if we take a look on the solar system all the planet's are moving in circular motion and there alot of examples are here in this universe./