8. True or False. Energy can move in waves.
2 answers:
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Answer:
<em>The velocity of the truck is 3.33 m/s</em>
Explanation:
<u>Law Of Conservation Of Linear Momentum </u>
The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and velocity v is
P=mv.
If we have a system of bodies, then the total momentum is the sum of the individual momentums:
If some collision occurs, the velocities change to v' and the final momentum is:
In a system of two masses:
There are two objects: The m1=4000 Kg car and the m2=6000 Kg truck. The car was moving initially at v1=4 m/s and the truck was at rest v2=0. After the collision, the car moves at v1'=-1 m/s. We need to find the velocity of the truck v2'. Solving for v2':
Substituting:
The velocity of the truck is 3.33 m/s
Given:
Shaft Power, P = 7.46 kW = 7460 W
Speed, N = 1200 rpm
Shearing stress of shaft, = 30 MPa
Shearing stress of key, = 240 MPa
width of key, w =
d is shaft diameter
Solution:
Torque, T =
where,
= 59.365 N-m
Now,
d = 0.0216 m
Now,
w = =
= 5.4 mm
Now, for shear stress in key
=
we know that
T = = F.
⇒ =
⇒ =
length of the rectangular key, l = 4.078 mm