Answer:
Velocity after collision will be 20 m/sec
Explanation:
We have given mass of arrow 
Mass of arrow 
Mass of apple 
Apple is at rest so velocity of apple 
According to conservation of momentum
Momentum before collision is equal to momentum after collision
v = 20 m/sec
The change in kinetic energy of the car is equivalent to the change in its potential energy. Thus:
K.E = P.E
1/2 x mΔv² = mgΔh
h = (8.2² - 5²) / 2(9.81)
h = 2.15 meters
K= (1/2) m v^2
so 0.5*0.145*<span>1281.64=92.92J of KE</span>
Answer:
Explanation:
Given
Lawn mover running for 
and does 
We know Power is rate of work i.e.
Thus Power output is
Answer:
-14.67
Explanation:
this is the answer because Calculating acceleration involves dividing distance by time, so now you to the opposite and multiply the acceleration times 9.
