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What is Newtons's Second Law of Motion?
A. Law of Inertia
B. Law of Acceleration
C. Law of Interaction
D. Law of Reaction
B. Law of Acceleration
Which of Law of Motion states that "an object at rest will remain at rest and an object in motion will stay in motion, as long as no external net force acts on it."
A. First Law
B. Second Law
C. Third Law
D. Fourth Law
A. First Law
Newton's 3rd Law states...
A. Objects in motion stay in motion and objects at rest stays at rest
B. Force is equal to mass times acceleration
C. For each action there is an equal and opposite reaction
C. For each action there is an equal and opposite reaction
An archer shoots an arrow. The action force is the bowstring against the arrow. The reaction force is...
A. Air resistance against the bow
B. Arrow's push against the bowstring
C. Grip of the archer's hand on the bow
B. Arrow's push against the bowstring
A player catches a ball. The action force is the impact of the ball against the player's glove. The reaction force is...
A. The force the glove exerts on the ball
B. The player's grip on the glove
C. Grip of the archer's hand on the bow
A. The force the glove exerts on the ball
The energy of a moving object is called energy of motion or ______.
A. Kinetic Energy
B. Gravitational Potential Energy
C. Elastic Potential Energy
A. Kinetic Energy
Which of the following refers to POWER?
A. It is the capacity to do work
B. It is the force applied to the object
C. It is the amount of work done over a period of time
C. It is the amount of work done over a period of time
Is there work done when you push a chair towards the center of the classroom?
A. Work is done
B. No work is done
A. Work is done
Whenever can you say that there is work done on an object?
A. When there is force applied and it moves in the direction of the applied force
B. When there is force applied and it moves opposite the direction of the applied force
C. When the force applied does not make the object move
A. When there is force applied and it moves in the direction of the applied force
The energy at rest or energy of location is called....
A. Kinetic Energy
B. Potential Energy
C. Elastic Energy
B. Potential Energy
What is the formula for Force?
F=ma
What is the formula for Work?
W=Fd
What is the equivalent of Joules (J)?
A. kg.m/s²
B. kg.m²\s²
C. N.m/s
B. kg.m²/s²
What is the formula for Potential Energy?
PE=mgh
What is the formula for Kinetic Energy?
KE=1/2 mv²
Calculate:
How much force is needed to accelerate a 50kg skier at 10m/s?
F=500N
Calculate:
A 50kg skater pushed by a friend accelerates 5m/s². How much force did the friend applied?
F=250N
Calculate:
What is the acceleration of a 50kg object pushed with a force of 500 N?
a=10 m/s²
A force of 250 N is applied to an object that accelerates at a rate of 5m/s². What is the mass of the object?
m=50kg
Calculate:
Suppose a woman is pushing a grocery cart with a 500 N force along the 7 meters aisle, how much work is done in pushing the cart from one end of the aisle to the other?
W=3,500 J