District practice V2

A small car and large truck hit each other, which one experiences more force on it

• truck
• car
• same on both

You leave home on your bike at 2:00 PM to visit your grandma who lives 3 km away. After spending some time with her, you cycle back home at 4:00 PM. You then decide to meet a friend at the park, which is 2 km further from your house than your grandma's place. Later you biked home. What is the total distance you cycled throughout the day?

• a. 0 km
• b. 3 km
• c. 5 km
• d. 16 km

You leave home on your bike at 2:00 PM to visit your grandma who lives 3 km away. After spending some time with her, you cycle back home at 4:00 PM. You then decide to meet a friend at the park, which is 2 km further from your house than your grandma's place. Later you biked home. What is the total displacement you cycled throughout the day?

• 0 km
• 3 km
• 5 km
• 16 km

Newton's second law of motion is

• a. The acceleration of an object is independent of its mass and the force acting on it.
• b. An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction unless acted upon by an unbalanced force. (This is Newton's first law)
• c. For every action, there is an equal and opposite reaction. (This is Newton's third law)
• d. The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

If you push a stationary skateboard across the ground, it starts to move. What is the scientific term for what caused the skateboard to move?

• a. Gravity
• b. Friction
• c. Unbalanced force
• d. Inertia

The statement "To every action, there is an equal and opposite reaction" refers to which scientific law?

• a. Newton's first law of motion (Law of inertia)
• b. Newton's second law of motion (Force equals mass times acceleration)
• c. Newton's third law of motion
• d. The law of universal gravitation

When you walk across the ground and push on it with your feet

• There is no effect on the ground
• The normal force is less than your weight
• The normal force is the same as your weight
• The normal force is more than your weight

Momentum is a quantity used to describe a moving object. What two properties of the object contribute to its momentum?

• a. Color and size
• b. Mass and velocity
• c. Shape and temperature
• d. Friction and direction

When do your arms exert work on a stack of books?

• Carrying a heavy stack of books
• Dropping a stack of books onto a table
• Holding a heavy stack of books while standing
• Lifting a stack of books off a table

According to physics, work is done only when: Select ALL that are correct

• a. A force is applied to an object.
• b. An object is picked up off the ground.
• c. A force causes an object to move in the direction of the applied force.
• d. The object speeds up.