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marta [7]
3 years ago
14

A 30 N force toward the west is applied to an object. The object moves 50 m east during the time the force is applied. What is t

he change in kinetic energy of the object?
a) 1.0 J
b) 750 J
c) 1.7 J
d) -1500 J
Physics
1 answer:
katovenus [111]3 years ago
8 0

Answer:

D.<u>-1500Joules</u>

Explanation:

The change in kinetic energy of the object s equivalent to the workdone by the body in the west direction (negative x direction)

Workdone = Force * Distance

Given

Force = 30N

Distance moved by the object = 30m

Required

Kinetic energy

Kinetic energy = 30 * 50

Kinetic energy = 1500Joules

Since the body moves in the negative  direction, hence the kinetic energy will be <u>-1500Joules</u>

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3 years ago
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Answer:

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4 0
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Two cats are sitting on a 30 m hill. One cat
V125BC [204]

Answer:

Cat with 6 kg sitting on a 30 meter hill has greater potential energy.

Explanation:

gravitational potential energy (J) = mass (kg) × gravitational field × height (m)

<h3 /><h3><u>Note</u>:</h3>

gravitational field in Earth is 10 N/kg = <u>fixed unit</u>

<h3 /><h3><u>Given</u>:</h3>

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2nd Cat: 6 kg

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