Work, energy and power

What are the two necessary conditions for work to be done?

• Force and Velocity

• Force and Displacement

• Force and Time

What is the unit for work?

• Joules

• Newton

• Watts

Which of the given pictures shows that work can not done?

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• 
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In comparing of table tennis ball and tennis ball, which ball covered a longer distance once it was placed in a slope?

• table tennis ball

• tennis ball

• same distance

Tags

NGSS.HS-PS2-1

What are the factors affect gravitational potential energy?

• Mass and Velocity

• Mass, Acceleration due to gravity, and Height

• Mass, Acceleration due to gravity and Time

Tags

NGSS.MS-PS3-2

Which of the following illustration shows elastic potential energy?

• 
• 
• 

Which of the following statements show kinetic energy?

• The battery of a lit flashlight

• A golf ball placed at the edge of the hole

• A river flowing down a hill

Tags

NGSS.HS-PS2-1

When did an object have more kinetic energy?

• When the time given on an object doubled

• When the mass of an object doubled

• When the mass of an object becomes half

What are the factors that can affect the power?

• Work done and time

• Work done and velocity

• Work done and force

What will be the formula if we are finding the TIME using the formula of power?

• $Time\ =\ \frac{work\ done}{power}$

• $Time\ =\ \frac{power}{work\ done}$

• $Time\ =\ work\ x\ power$