Warm-up 5.1

What is the formula for calculating kinetic energy?

A 2 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?

• 3 J

• 6 J

• 9 J

• 18 J

What is the formula for gravitational potential energy?

• 49 J

• 98 J

• 490 J

• 980 J

Which of the following best describes mechanical energy?

• The energy stored in chemical bonds

• The sum of kinetic and potential energy in a system

• The energy due to an object's temperature

• The energy associated with electric charges

• 196 J

• 80 J

• 276 J

• 570 J

What happens to the kinetic energy of an object if its velocity is doubled?

• It remains the same

• It doubles

• It quadruples

• It halves

• 58.8 J

• 196 J

• 294 J

• 588 J

Which of the following is true about potential energy?

• It depends on the speed of the object

• It is always greater than kinetic energy

• It is energy stored due to position

• It cannot be converted to kinetic energy

A pendulum has a maximum potential energy of 50 J at its highest point. What is its kinetic energy at the lowest point?

• 0 J

• 25 J

• 50 J

• 100 J