8 Energy – forces doing work

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Question 101

H

A motor pulls a crate along a straight, level track. It applies 80 N for the first 2.0 m and 50 N for the next 4.0 m. A constant frictional force of 30 N acts throughout. What is the increase in the kinetic energy of the crate?

[1]

$J120\ \mathrm{J}$

$J360\ \mathrm{J}$

$J540\ \mathrm{J}$

$J180\ \mathrm{J}$

8 Energy – forces doing work

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Question 101

H

A motor pulls a crate along a straight, level track. It applies 80 N for the first 2.0 m and 50 N for the next 4.0 m. A constant frictional force of 30 N acts throughout. What is the increase in the kinetic energy of the crate?

[1]

$J120\ \mathrm{J}$

$J360\ \mathrm{J}$

$J540\ \mathrm{J}$

$J180\ \mathrm{J}$

8 Energy – forces doing work

Question 101

Markscheme

8 Energy – forces doing work

Question 101

Markscheme

8 Energy – forces doing work

Question 101

8 Energy – forces doing work Questions

8 Energy – forces doing work

Question 101

8 Energy – forces doing work Questions