Acceleration= change in velocity/time
Answer:
25032.47 W
Explanation:
Power is the time rate of doing work, hence,
P = Work done(non conservative) / time
Work done (non conservative) is given as:
W = total K. E. + total P. E.
Total K. E. = 0.5mv²- 0.5mu²
Where v (final velocity) = 7.0m/s, u (initial velocity) = 0m/s
Total P. E. = mgh(f) - mgh(i)
Where h(f) (final height) = 7.2m, h(i) (initial height) = 0 m
=> W = 0.5mv² - mgh(f)
P = [0.5mv² - mgh(f)] / t
P = [(0.5*790*7²) - (790*9.8*7.2)] / 3
P = (19355 + 55742.4) / 3 = 75097.4/3
P = 25032.47 W
Well im not sure if this is the correct dating materials but here are some examples of Fundamentals of radiometric dating<span>Radioactive decay.
Accuracy of radiometric dating.
Closure temperature.
The age equation.
Uranium–lead dating method.
Samarium–neodymium dating method.
Potassium–argon dating method.
<span>Rubidium–strontium dating method.</span></span>
<span>Transitional environments</span>
Answer:
V₂ = - m₁ V₁ / m₂
Explanation:
According to law of conservation of momentum, "Total momentum of an isolated system remains constant. i.e
Pi = Pf
We consider ball and catapult an isolated system.
before launching ball momentum of the system is zero.
After launching ball momentum of ball is:
Pb= 0.1 * 500 = 50 kg m/s
Now according to law of conservation of momentum:
Pf = Pi
⇒ Pb + Pc = 0
Let Pb= m₁ V₁
& Pc = m₂ V₂
So
m₁ V₁ + m₂ V₂ = 0
⇒ V₂ = - m₁ V₁ / m₂
The negative sing shows that catapult velocity will have opposite direction to the ball velocity.
