A wagon full of manure accidentally rolls down a driveway for 5.0m while a person pushes against the wagon with a force of 420 N to bring it to a stop. What is the change in kinetic energy for the wagon?
2 answers:
Answer:
2100 J
Explanation:
Parameters given:
Force acting on the object, F = 420 N
Distance moved by object, d = 5m
The change in kinetic energy of an object is equal to the work done by a force acting on the object:
W = F * d
∆KE = F * d
∆KE = 420 * 5
∆KE = 2100 J
Answer:
∆KE = 2100 J
Explanation:
Given:
Force of person pushes against the wagon= F = 420 N
Distance = d = 5.0 m
When you accelerate an object, you are doing work against inertia. It is proven that work equals the change in kinetic energy of the object.
therefore, W = ΔKE
where,
W is the work done against the resistance of inertia
ΔKE is the change in kinetic energy (Δ is Greek letter capital delta)
Also, W = F x d
∴∆KE = F x d
∆KE = 420 x 5
∆KE = 2100 J
The change in kinetic energy for the wagon is 2100 J
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