Question

what is the force that acts on an object and opposes its motion called?
friction
thermal energy
inertia

question 2
what type of energy is produced by friction?
thermal energy
solar energy
radiant energy
mechanical energy

question 3
true or false. friction can be reduced by lubricating or changing the shape of objects.
true
false

Explanation:

• Question 1: Friction is the force that opposes an object's motion. Thermal energy is related to heat, and inertia is the tendency of an object to resist changes in its state of motion.
• Question 2: When friction occurs, it causes molecules to vibrate more, which results in thermal energy. Solar energy comes from the sun, radiant energy is energy in the form of electromagnetic waves, and mechanical energy is related to the motion and position of an object.
• Question 3: Lubricating (e.g., using oil) reduces friction by making surfaces smoother. Changing the shape (e.g., making an object more streamlined) also reduces friction as there is less resistance to motion.

Answer:

• Question 1: Friction
• Question 2: Thermal energy
• Question 3: True