Answer:
100
Explanation:
by dividing 2000N and 1000kg.
An object in motion will stay in motion unless acted upon another force.
Newton used this to prove that gravity existed. Without an unseen force, we could throw a ball and it would go on forever correct? Unless there was something to pull it down, in this case, gravity.
Answer:
The combining of light nuclei is called nuclear fusion.
Answer:

Explanation:
Impulse-Momentum relation:


We solve the equations in order to find the braking force:

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
<span>a=Δω/Δt
</span><span>a=2π*Δf/Δt
</span><span>a=2π*(f2-f1)/Δt
</span>
<span>f1=f2-a*Δt/2π
</span><span>f2=800/60 rev/sec
</span><span>a=-42 rad/sec^2
</span><span>Δt=1.75sec
</span><span>so
f1=25 rev/sec
f1=1500 rev/min</span>