During a test

PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy

Problem

During a test, a motor delivers

60\,\text{W}

for the first

4\,\text{s}

40\,\text{W}

for the next

6\,\text{s}

and

20\,\text{W}

for the last

2\,\text{s}

. How much work does the motor perform in the entire

12\,\text{s}

period? (a)

480\,\text{J}

(b)

560\,\text{J}

(c)

520\,\text{J}

(d)

600\,\text{J}