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100
If 550N acts on a 10kg object, what is the acceleration?
What is F=ma, 550=10x, acceleration is 5.5 m/s2
100
What is inertia?
What is the tendency of an object to resist any change in its motion
100
Which law states that an object remains constant unless an unbalanced force acts on it?
What is Newtons 1st law
100
When you push downward on a chair with your legs to jump, the chair exerts what kind of force?
What is an equal force to your legs
100
What are balanced forces?
What is forces that are equal in size and opposite in direction
200
If you push on a rock with a force of 25N to the right, and your friend pushes on the rock with 5N to the left, explain the motion of the rock. (draw a picture if it helps)
What is The rock will move with a force of approximately 20N to the right.
200
What is a force?
What is a push or pull on an object
200
Which law uses an example of a rocket launching?
What is Newton's 3rd Law
200
How does a centripetal force move compared to a circular motion?
What is always perpendicular to the motion
200
If a net force acts on an object, what can happen to the object (3 things)?
What is change speed, change direction, or both
300
What is the force of an object that has a mass of 15kg and acceleration of 10m/s2?
What is F=ma, 15*10=150N
300
To sled downhill gravity needs to be greater than which force?
What is normal friction
300
What is Newton's 1st Law?
What is an object at rest will remain at rest or an object in motion will move with constant speed unless a net force is applied
300
What is an unbalanced force?
What is forces that are opposite but not equal in size.
300
What kind of force causes an object to accelerate?
What is unbalanced forces.
400
Two hockey players collide off each other. The first player has a mass of 75kg and is accelerated 15m/s2. The second player is accelerated 10m/s2. What is the mass of the second hockey player?
What is F=ma, F1=F2, m1a1=m2a2, 75(15)=x(10), x=112.5kg
400
Why does friction never speed up an object?
What is it always acts in the opposite direction of motion
400
What is Newton's 2nd Law?
What is an object acted upon by a force will accelerate in the direction of the force, acceleration equals net force divided by mass, F=ma
400
How does air resistance relate to speed?
What is the faster you move the greater the air resistance until you reach terminal velocity.
400
How much time occurs between an action and reaction?
What is none, zero, zilch, big ole goose egg.....
500
A 0.2kg kickball is thrown at a kicker at 50m/s and is kicked back towards the pitcher at -35m/s. If the ball is in contact with the kicker for 0.0010s, how hard does the kicker kick the ball?
What is F=mass times acceleration. F=0.2(50-(-35)/0.001)=17000N
500
What two things do you need to figure out acceleration?
What is net force and mass
500
What is Newton's 3rd Law?
What is forces always act in equal but opposite pairs, for every action there is an equal and opposite reaction
500
What is the force you have to overcome when you first move an object?
What is static friction
500
When a car goes around a curve at a constant speed, what kind of force is acting on it?
What is a net force