IB Physics - Topic 2: Energy

Calculate the PE of a 2 kg cat perched 10 meters above the ground. 

• 20 J
• 200 J
• 2.04 J
• 200 W

Tags

NGSS.MS-PS3-2

Calculate the work needed to raise a 3 kg cat up to a height of
4 m.

• 12 J
• 0 J
• 120 J
• 1.22 J

When my velocity triples, my kinetic energy increases by ______ times.

• 9
•  3 
• 1.5
• 4.5

Tags

NGSS.MS-PS3-1

A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s.  What is the amount of work in joules needed to accelerate the box?

• 50.0
• 60.0
• 20.0
• 45.0

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

True or false: when the distance an object moves is zero the work done on the object is also zero.  

• True
• False

The work-kinetic energy theorem says that the net work done by all the forces acting on an object is equal to the change in the object's _____.

• mechanical energy
• work
• momentum
• kinetic energy

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

While a boulder is on the top of a hill it has what type of energy? 

• Mechanical
• Kinetic
• Potential 
• Reactive 

Tags

NGSS.MS-PS3-2

The unit of energy is?

• Watt

• Kilojoule

• Kilogramme

• Volt

Complete the statement about the principal of Conservation of Energy.

Energy can be changed for one form to another but the total amount of energy

• always increases

• always decreases

• does not change

• varies according to the reaction

Tags

NGSS.HS-PS3-3