Question

1. choose the best answer.

the rate of motion over a certain amount of time is
o speed
gravitational force
o heat
o friction

1. choose the best answer.

forces cause objects to move or change direction.
o chemical
o unbalanced
o thermal
o balanced

Explanation:

• Question 3: Speed is defined as the rate of motion over a certain amount of time. Gravitational force is a force of attraction between objects. Heat is a form of energy. Friction is a force that opposes motion.
• Question 4: Unbalanced forces cause objects to move or change direction. Balanced forces result in no change in motion. Chemical forces are related to chemical reactions. Thermal forces are related to heat.

Answer:

1. speed
2. Unbalanced