Answer:
Explanation: forces can cause an object to rotate and the turning effect of the force is called a moment. If a resultant force acts on an object about a fixed turning point it will cause the object to rotate e.g. turning a with a spanner, applying a screwdriver, opening a door fixed on
Answer:
The position x, is ± 0.4 m.
Explanation:
The total mechanical energy of the oscillatory motion is given as;
When the kinetic energy (E) is half of the elastic potential energy (U);
Equate (1) and (2)
Thus, the position x, is ± 0.4 m.
Answer:
A. Sound comes from the ball every time it bounces.
B. The ball is warmer after it stops bouncing than it was before it
started bouncing
Explanation:
It is evidently shown that the ball shown energy transformation because it produces sound at each bounce and also becomes warmer after the bounce.
The law of conservation of energy suggests that energy is neither created nor destroyed but transformed from one form to another.
- a bouncing ball produces sound energy at each bounce. This is conversion of potential energy initially of the ball into kinetic energy of sound.
- Also, the motion of the ball produces kinetic energy which causes the ball to warm up, this is thermal energy.
- We see that a ball originally with potential energy has yielded the kinetic forms of energy which are sound and thermal energy.
Answer:
a. 2.856 x 10^-6 m³
b. 0.288 J
c. 971.88 J
d. 971.592 J
Explanation:
d) The change in internal energy of the cube.
Note: For Copper -
B(beta)= 5.1 × 10^-3 (C)^-1
Cp = 390J/Kg.K
p (Rho) = 8.90 × 10³Kg/m³
Detailed solution is attached below
Answer:
1.22kg
Explanation:
info given:
height (h) = 7.25m
g = 9.81m/s^2
PE = mgh
Plug in info and solve for m.
m(9.81m/s^2)(7.25m) = 87.4J
m = 1.22kg
