Answer:
0.000000009006 or 9.006 x 10^-9
Explanation:
0.0000038 x 0.00237 = 0.000000009006 or 9.006 x 10^-9
I think it is d if not then im sorry
The formula is=1/2(m x v^2)
so = 1/2*(0.05)*(310)^2
ans is =2402.5 joules
Answer:
Yes it is possible to increase the power with out changing the amount of work.
Explanation:
The power is defined by the amount of power divided by the time. This time is the one needed to do the work. We can understand this issue by analyzing an example with numeric values.
Work = 500 [J]
Time = 5 [s]
Power will be:
Now if we change the time to 2 seconds:
As we can see, the power was increased without the need to change the work.
ANY force at all, acting in the right direction, will stop him.
But smaller forces will take longer.
In order to either speed him up or slow him down at the rate
of 20 m/s every second, the force required is
(mass) x (acceleration) = (120 kg) x (20 m/s²)
= (2400 kg-m/s²) = 2400 N .
The force can either increase or decrease his speed at that rate,
depending on the direction in which it acts on him.
If the force is exerted opposite to the direction in which he's already
moving, then it can stop him if it continues long enough.