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Laabri

Conceptual 6-1(B)

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Last updated about 3 years ago
7 Nsɛmmisa
Ɛhia
2
Asemmisa {{asɛmmisaAhyɛnsode}}
1.

Match the type of work to its impact:

Draggable itemarrow_right_altCorresponding Item

Negative work

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Adds energy

Positive work

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Removes energy

Two bobsledders and their sled have a combined mass of 500 kg. It is initially stationary, but the athlete in back pushes it over the course of 3 meters and gets it up to a speed of 2m/s.

Ɛhia
1
Ɛhia
1.5
Ɛhia
1.5
Ɛhia
1
Ɛhia
2
Ɛhia
1
Asemmisa {{asɛmmisaAhyɛnsode}}
2.

What is the KE of the sled before the push?

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3.

What is the KE of the sled after the push?

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

How much work was done?

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

Since the force and displacement are in the same direction, this push represents _____________ work

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6.

How much force did he push with?

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7.

Complete the energy diagram: