16. An object has a mass of 13.5 kilograms. What force is required to accelerate it to a rate of 9.5 m/s2?
2 answers:
Answer:
D. 128.25 N
Explanation:
The force exerted on an object and the acceleration of the object are related by the following equation (Newton's second law):
where
F is the force exerted on the object
m is the mass of the object
a is the acceleration
In this problem, we know:
- The mass of the object: m = 13.5 kg
- The acceleration: a = 9.5 m/s^2
Therefore, we can find the force required to give the object this acceleration:
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Answer:
The correct option is (b).
Explanation:
We need to find the work done to increase the speed of a 1 kg toy car by 5 m/s.
We know that, the work done is equal to the kinetic energy of an object i.e.
So, 12.5 J of work is done to increase the speed of a 1.0 kg toy car by 5.0 m/s.