Forms of Energy & Conservation

Try these questions

5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.

1. 1. A matatu driver doubles the speed of the vehicle from 10 m/s to 20 m/s. By what factor does the kinetic energy of the matatu increase?

   • A. 2 times
   • B. 4 times
   • C. 8 times
   • D. It stays the same

2. 2. A pendulum in a science laboratory slowly swings lower and finally comes to rest. What has happened to its mechanical energy?

   • A. It has been destroyed
   • B. It has been changed into thermal and sound energy in the surroundings
   • C. It has all become gravitational potential energy
   • D. It has been created again in the string

3. 3. An archer draws a bow and shoots an arrow that hits a target. Which sequence of energy changes is correct?

   • A. Elastic potential → chemical → kinetic → thermal and sound
   • B. Kinetic → chemical → elastic potential → sound
   • C. Chemical → elastic potential → kinetic → thermal and sound
   • D. Chemical → kinetic → elastic potential → thermal

4. 4. A mango of mass 0.5 kg falls freely from a branch 5 m above the ground. Ignoring air resistance and taking g = 10 m/s^2, calculate the speed of the mango just before it hits the ground.

   Type your answer (in m/s) in the lesson.

5. 5. Name the form of energy stored in the stretched rubber strip of a catapult.

   Type your answer in the lesson.

More in Energy, Work, Power and Machines

• ▸Factors Affecting Stability and Structural Design
• ▸Parallel Forces and Multiple Supports
• ▸Torque, Couples and Resolution of Forces
• ▸Practical Applications and System Consolidation
• ▸Concept and Measurement of Work
• ▸Power and the Rate of Doing Work
• ▸Introduction to Machines, Mechanical Advantage and Velocity Ratio
• ▸Machine Efficiency and Energy Losses

See every Grade 10 Physics lesson →