2. Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted at a speed of

2 m/sec. The other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec.

a. Which object had more kinetic energy while it was being lifted?

Question

Physics

Daniel Rose

5 November, 04:14

2. Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted at a speed of

2 m/sec. The other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec.

a. Which object had more kinetic energy while it was being lifted?

+3

Answers (1)

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Pena · Answer 1

To find the kinetic energy KE=1/2 * mass * velocity ^2

for object 1 ke = 1/2 (2) (2^2) = 4 J

for object 2 ke = 1/2 (4) (3^2) = 18J

meaning object 2 as more kinetic energy.

2. Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted at a speed of2 m/sec. The other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec.a. Which object had more kinetic energy while it was being lifted?

2. Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted at a speed of

2 m/sec. The other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec.

a. Which object had more kinetic energy while it was being lifted?