Answer:
15.29m/s
Explanation:
Using the law of conservation of momentum
m1u1+m2u2 = (m1+m2)v
m1 is the mass of the clown = 85kg
u1 is the velocity of the clown = 0m/s (fired out from rest)
m2 is the mass of the cannon = 480kg
u2 is the velocity of the cannon = 18m/s
Let v me the recoil speed of the cannon
Substitute into the formula
85(0)+480(18) = (85+480)v
0+8640 = 565v
v = 8640/565
v = 15.29m/s
Hence the recoil speed of the cannon is 15.29m/s
Answer:
W = 1493.9 J = 1.49 KJ
Explanation:
The work done by the elevator on the object will be equal to the gain in is potential energy:
W = ΔP.E
W = mgΔh
where,
W = Work = ?
m = mass of object = 7.4 kg
g = 9.8 m/s²
Δh = gain in height = 20.6 m
Therefore,
W = (7.4 kg)(9.8 m/s²)(20.6 m)
<u>W = 1493.9 J = 1.49 KJ</u>
The volume of water displaced in the beaker is equal to the volume of the submerged part of the can.
<h2>ANSWER:</h2><h2>
_____________________________________</h2>
<u>DATA</u>:
m = 0.05 kg
Vf = 10 m/s
Vi = -10 m/s
t = 4 times hits in 2 second
<h2>_____________________________________</h2><h3><u>SOLUTION</u>:</h3>
The momentum ρ is given by,
ρ = mV
where,
m = mass
V = velocity
<h2>_____________________________________</h2>
The Equation for average force is given by,
F = Δρ/Δt
where,
Δt = time taken
Δρ = change in momentum. Which is given by,
Δρ=
Vf = final velocity which is the rebound velocity here
Vi = Initial velocity which is the velocity before striking the wall
So Substitute the equation of momentum in the equation of force
F =
<h2>_____________________________________</h2><h3>SUBSTITUTING THE VARIABLES IN THE EQUATION</h3>
F =
F =
F =
F =
F = 0.5N
<h3>__________________________________________________</h3><h2>0.5 NEWTON is the average force on the wall</h2><h2>_____________________________________ </h2>
I hope my answer helped you