Science
What are the action and reaction forces of this scenario:
"A person is jumping off of a boat into the water."
action: person jumping into water
reaction: water hitting person
What will happen to an object at rest if the net force acting on it is zero?
it will stay at rest
Which of Newton's laws represents this scenario:
a car going 70 mph is harder to stop than a car going 20 mph
Newton's 2nd law
What is the mass of a car traveling west with a momentum of 22,500 kg·m/s and a velocity of 15 m/s?
1,500 kg
A 8 kg table has a net force of 32 N acting on it. What is the acceleration of the table?
4 m/s ^2
What determine's an object's acceleration?
force and mass
The formula force = mass x acceleration applies to which of Newton's laws?
Newton's 2nd law
Which of Newton's laws best represents this scenario:
a book will stay still on a table until something causes it to move
Newton's 1st law
A balloon accelerating upward while air pushes down on the balloon is an example of what two types of forces?
action and reaction
The measurement of how quickly something is moving or being done is called?
speed
Why is Newton's 1st law called the law of inertia?
because inertia is an object's tendency to resist change in motion
What is the net force of 100 N to the right and 250 N to the left?
150 N to the left
What is the momentum of a car if it has a mass of 2000 kg and a velocity of 20 m/s?
40,000 kg x m/s
A 5kg object that is accelerating at 7 m/s squared has how much net force?
35 m/s squared
Speed and direction measures?
velocity
If three people pushing on a car each apply a force of 50 N, how much force does the car exert on each person?
50 N
In Newton's second law of motion, acceleration can be calculated if ________ and ________ are known.
net force and mass
What is the momentum of a train if it has a mass of 11,000 kg and has a velocity of 17 m/s?
187,000 kg x m/s
What is the force of an object that has a mass of 35kg and is accelerating at a rate of 5 m/s2?
175 N
The force that causes a moving object to slow down when it touches another object is called?
friction
In a tug of war, the team on the left pulls with a force of 500 N and the team on the right pulls with a force of 400 N. What is the net force on the rope?
100 N to the left
Which of Newton's laws represents this scenario:
a rocket taking off
Newton's 3rd law
What is the momentum of a train if it has a mass of 12,000 kg and has a velocity of 16 m/s?
192,000 kg x m/s
The combination of all the forces acting on an object is called ___________________?
net force
Two forces unequal in size and acting opposite in direction is called?
unbalanced forces