WORK, POWER, ENERGY - 2

WORK, POWER, ENERGY - 2

Multiple Choice

A force acting upon an object to cause a displacement is known as

• Energy

• Potential

• Kinetic

• Work

Multiple Select

units for work are

• joule

• newton

• watt

• newton-metre

Multiple Choice

Power is defined as the ____ is done

• amount of work which

• angle at which work

• the rate at which

• the direction at which

Multiple Choice

Can two machines lifting equal weight to the same height have different power outputs ?

• Yes

• No

Multiple Select

Choose the units of power

• Watt

• joule

• Joule/second

• hp

Multiple Choice

A lifts 25 kg barbell over his head 10 times in one minute while B lifts 25 kg barbell over his head 10 times in 30 seconds. Who does more work?

• A

• B

• Same

• Cannot be said

Multiple Choice

A lifts 25 kg barbell over his head 10 times in one minute while B lifts 25 kg barbell over his head 10 times in 30 seconds. Who is more powerful?

• A

• B

• Same

• cannot be said

Multiple Choice

Weight of Jack is twice that of Jill. Jill went up the hill in half the time than that of Jack. Who does more work ?

• Jack

• Jill

• Same

• Cannot be said

Multiple Choice

Weight of Jack is twice that of Jill. Jill went up the hill in half the time than that of Jack. Who shows more power ?

• Jack

• Jill

• Same

Multiple Choice

Shyam having a mass of 60 kg runs up a stair of 20 steps of 10 cm each in 10 seconds. Find his power rating. take g = 10  m / $s^2$   

• 12000 W

• 1200 W

• 120 W

• 12 W