how much work does tension do on the laptop as it moves 2.0 mm ? express your answer with the appropriate units.
1 answer:
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Answer:
The constant angular acceleration of the wheel is 12.16 rad/s²
Explanation:
Given;
initial angular distance, θ = 28
time of the motion, t = 5 s
initial angular velocity is calculated as;
final angular velocity is given as,
The constant angular acceleration is calculated as;
Therefore, the constant angular acceleration of the wheel is 12.16 rad/s²
Answer:
a) 12.528 m/s
b) 15.344 m/s
Explanation:
Given:
Mass of the child, m = 34.9 kg
Height of the water slide, h = 16.0 m
Now,
a) By the conservation of energy,
loss in potential energy = gain in kinetic energy
mgh =
where,
g is the acceleration due to the gravity
v is the velocity of the child
thus,
at halfway down, h = = 8 m
therefore,
34.9 × 9.81 × 8 =
or
v = 12.528 m/s
b)
at three-fourth way down
height = = 12 m
thus,
loss in potential energy = gain in kinetic energy
34.9 × 9.81 × 12 =
or
v = 15.344 m/s