phyrev3
TRANSCRIPT
REVIEW WEEKREVIEW WEEK
Day 3Day 3
• A distant planet has 3 times the gravitational force of Earth. So on that planet, a 100g object will have a mass of
• Force is a vector quantity because it has:
• A boat is propelled forward by a sail and an engine. The engine exerts a force of 20 N East and the sail exerts a force of 5 N East. What is the net force exerted on the boat?
• The amount of force required to move a 100kg object with an acceleration of 13.5 m/s2 is:
• Newton's third law of motion is concerned with:
• A baseball player hits a ball with a force of 100N. With what amount of force did the ball hit the bat?
• A waiter is showing-off to a crowd by setting objects on top of a tablecloth and quickly pulling the tablecloth out from under the objects without disturbing them. A man brings the waiter a glass to put on the tablecloth, but before doing the trick the waiter fills the glass with water. Why does he add the water?
• The amount of gravity a body has is directly proportional to _________
• The law of inertia applies to objects both at_______ and in ___________
• A woman pushes on her car's gas pedal with a force of 7 N and her car accelerates at a rate of 14 m/s2, how much does the car weigh?
• A .3kg ball is hit with an instantaneous force of 18N, at what rate will it accelerate?
• What affect does gravity have on inertia?
• Whirl a rock at the end of a string and the rock follows a circular path. If the string breaks, the rock tends to follow what kind of path?
• One object weighs 20lbs on Earth, and another object weighs 20lbs on the moon, which object has more mass?
• An archer shoots an arrow. Consider the action force as being the bowstring pushing against the arrow. The reaction force would be:
• If a 70-kg swimmer pushes off a pool wall with a force of 250 N, what is her acceleration?
• The fact that even a hockey puck will eventually come to a stop is an example of