Exploring Kinetic Energy concepts TEST III

Describe what kinetic energy is and provide its formula using a real-world scenario. For example, consider a car moving on a highway.

Mia is learning about physics. She wants to be helped on how to identify the factors that affect the kinetic energy of an object: ​ (a)  

• Mass and height

• Velocity and temperature

• Height and temperature

• Mass and velocity

Determine the kinetic energy of a 12 kg bicycle ridden by Daniel moving at a velocity of 7 m/s.

• 294 J

• 588 J

• 2940 J

• 5880 J

Relate the following scenarios with their effects on kinetic energy.

• An object's velocity is halved.

• The kinetic energy increases nine times.

• An object is at rest and remains at rest.

• The kinetic energy triples.

• An object's velocity is tripled.

• The kinetic energy halves.

• An object's velocity is tripled.

• The kinetic energy remains the same.

Compare the kinetic energy of two cars with the same mass but different speeds: 4 m/s and 8 m/s.

• The car moving at 4 m/s has more kinetic energy.

• The car moving at 8 m/s has more kinetic energy.

• Both cars have the same kinetic energy.

• The kinetic energy cannot be determined.

Label the following as either kinetic energy or potential energy: Priya cycling downhill.

• Kinetic energy

• Potential energy

Determine the mass of Maya's bicycle if its kinetic energy is 450 J and its velocity is 5 m/s.

• 18 kg

• 36 kg

• 9 kg

• 45 kg

David is experimenting to measure the kinetic energy of a moving object. List the units he should use to calculate kinetic energy.

• Joules

• Newtons

• Watts

• Pascals

Match the following statements about kinetic energy with their correct descriptions.

• Kinetic energy remains the same regardless of mass when velocity is constant.

• Kinetic energy is inversely proportional to mass.

• As mass increases, kinetic energy increases when velocity is constant.

• Kinetic energy is exponentially related to mass.

• Kinetic energy increases at an increasing rate as mass increases when velocity is constant.

• Kinetic energy is independent of mass.

• As mass increases, kinetic energy decreases when velocity is constant.

• Kinetic energy is directly proportional to mass.

Determine the velocity of a car driven by Liam if its kinetic energy is 200 J and its mass is 4 kg.

• 10 m/s

• 5 m/s

• 7 m/s

• 8 m/s