Answer:
Given:
Initial velocity, u = 0 m/s
Final velocity, v = 34 m/s
Time interval,
Solution:
Acceleration is the rate at which the velocity of an object changes.
Thus
Average acceleration,
What is the measurement of loudness of sounds
1 answer:
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Answer:
2.2N
Explanation:
Given parameters:
Work done = 379.5J
Height = 173m
Unknown:
Amount of force exerted on the sled = ?
Solution:
The amount of force she exerted on the sled is the same as her weight.
Work done is the force applied to move a body through a distance.
Work done = mgh
m is the mass
g is the acceleration due to gravity
h is the height
mg = weight;
Work done = weight x h
379.5 = weight x 173
weight = = 2.2N