Answer:
can you ask clear questions I did not understand your question
Answer:
1109m
Explanation:
The distance h₁ traveled by the rocket during acceleration:

The velocity v₁ at this height h₁:

When the rocket runs out of fuel, energy is conserved:

Solving for h₂:

(,I hope this helps yoy)
Explanation:
1.If the displacement of an object is zero,the speed must be zero.
Not true
2.(your answer is true)
3.false
4.true
Answer:

Explanation:
As we know that work done by electric force is given as

so here we know that charge is moving from

to another position
so we will have




Answer:
P = W / t = m g s / t = m g v where work by auto = m g s
30 kw = 30000 watts = 30000 J / s
Work wasted = F v as shown above relating work and power
Work done against incline = m g s sin 8.75 and power against incline
= m g v sin 8.75 = 1222 v Joules / sec
power in moving auto = power available - power lost to friction
power in moving auto = 30000 - resistance = 30000 - 910 v
1222 v = 30000 - 910 v
v = 30000 / 2132 = 14 m/s
Note: constant resistance to motion must mean P = W / t = F s / t = F v