Definitions
Definitions
definitions
Questions
NJ ask practice
100
What is acceleration?
What is a change in an object's speed and direction.
100
What is inertia?
What is the tendency of objects to keep doing what they are doing.
100
What is Newton's third law of motion.
What is for every action there is an equal and opposite reaction.
100
If you hit the home run in space, what would happen?
What is the ball will move in a constant speed until it's going under the influence gravity.
100
Which of the following is an example of contact force?
What is friction.
200
What is contact force?
What is a force that must touch an object to change its speed and/or direction.
200
What is net force?
What is the amount by which the opposing forces acting on an object are unequal.
200
What is noncontact force?
What is a force that acts on an object to change its speed or direction from a distance.
200
Suppose that Sherin rides her bike at a speed of 10 m/s. As she rides up a hill, her speed decreases 5 m/s. Is her acceleration positive or negative?
What is her acceleration is negative.
200
In which situation are the forces acting on the object balanced?
What is a hot air balloon rises at a constant speed.
300
What is force?
What is a push or pull that causes something to change its motion.
300
What is newton?
What is the metric unit used to measure force or weight.
300
What is normal force
What is the force that pushes up to support the weight of an object.
300
Now suppose Sherin rides her bike down the street in 20 seconds. During this time, her speed remains constant at 5 m/s. What is the value of her acceleration during this time?
What is her speed is 10 m/s.
300
The net force acting on a object is 0 N. Which of the following best describes the motion of the object?
What is the object's motion is not changing.
400
What is friction?
What is a force that ocures when two things move past each other and rub together.
400
What is Newton's first law of motion?
What is if the forces act on an object are balanced, the object will continue to doing what it is doing.
400
Gabe kicked a soccer ball across a field. The ball rolled for a while but eventually stopped. If Newtons first law is true, it seemed the ball Gabe kicked should continue rolling forever. Why does the ball stop?
What is the ball stopped because of the friction on the ground.
400
What is an example for goes faster?
What is scooter going down a hill.
400
Sean pushes a parked car with a force of 80 newtons. The car does not move. Which of the following best describes the force that the car exerts on Sean.
What is the same amount of as Sean exerts.
500
What is gravity?
What is a force that acts without physical contact to pull two objects towards each other.
500
What is Newton's second law of motion?
What is The acceleration of an object is related to the net force acting on its mass of an object.
500
Suppose you are playing baseball and you hit a home run. What forces slow down the ball while it is in motion?
What is friction and gravity slowed down the ball while in motion.
500
Give an example for goes slower.
What is riding a scooter up a hill.
500
Which force has the greatest influence on the structure of solar and galaxies?
What is gravity.
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