test 6

What is transferred by a force moving an object through a distance?

• force

• mass

• motion

• energy

Work is a transfer of

• energy.

• force.

• mass.

• motion.

Which of the following is a unit of temperature?

• Celsius degree

• joule

• kilogram

• calorie

A small 30-kilogram canoe is floating downriver at a speed of 2 m/s. What is the canoe’s kinetic energy?

• 32 J

• 120 J

• 60 J

• 900 J

A 12-kg sled is moving at a speed of 3.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy?

• 1.5 m/s

• 4.2 m/s

• 6.0 m/s

• 9.0 m/s

Why is the gravitational potential energy of an object 1 meter above the moon’s surface less than its potential energy 1 meter above Earth’s surface?

• The object’s mass is less on the moon.

• The object’s weight is more on the moon.

• The moon’s acceleration due to gravity is less.

• both a and c

The gravitational potential energy of an object is always measured relative to the

• location where the object’s kinetic energy is zero.

• position of maximum mechanical energy.

• reference level from which the height is measured.

• surface of Earth.

The total potential and kinetic energy of all the microscopic particles in an object make up its

• chemical energy.

• electric energy.

• nuclear energy.

• thermal energy.

Walking converts what type of energy into mechanical energy?

• chemical

• electromagnetic

• nuclear

• thermal

Solar cells convert what type of energy into electrical energy?

• chemical

• electromagnetic

• nuclear

• thermal