3 rd quarter study guide
Jan 01, 2016
Acceleration. a. The rate at which velocity changes is
called b. Distance traveled in a unit of time c. Traveling from point A to point B
To determine the acceleration rate of an object, you must calculate the change in ________ during each unit of time a. speed. b. velocity. c. motion. d. deceleration.
Which of the following is an example of decreasing friction intentionally?
a. waxing skis b. throwing salt on an icy driveway
A bus that travels 250 kilometers in 5 hours is traveling at what average speed?
a. 50 km/h b. 100 km/h c. 2 km/h d. 25 km/h
Write next to each if rolling, fluid, or sliding friction a. your sneakers on a basketball court b. tires to a skate board c. a grease on a door hinge d. two hands rubbing together
Write next to each if rolling, fluid, or sliding friction a. your sneakers on a basketball court
Sliding b. tires to a skate board
Rolling c. a grease on a door hinge
Fluid d. two hands rubbing together
Sliding
The balloon rocket lab we preformed in class can be explained by a. Newton’s first law. b. Newton’s second law. c. Newton’s third law. d. the law of conservation of
momentum.
The force of gravity on a person or object at the surface of a planet is known as
a. mass. b. inertia. c. air resistance. d. weight.
When a person jumps off the diving board the only force acting on them is: a. stationary. b. decelerating. c. in free fall. d. a projectile.
The law of universal gravitation states a. all objects attract each other. b. all objects repel each other. c. all objects combine to provide a
balanced force. d. all objects create friction.
The greater the mass of an object,
a. the easier the object starts moving. b. the greater its inertia. c. the more balanced it is. d. the more space it takes up.
Velocity
a. You know acceleration of the object. b. You know distance the object has
traveled. c. You know both the speed and direction
of an object’s motion.
According to Newton’s third law of motion, when a ball bounces and exerts force on a floor, the floor
a. creates a friction with the ball. b. bounces higher. c. exerts an equal force back on the
ball. d. moves at a constant speed.
What happens when two forces act in the opposite direction? a. They work against each other. b. The stronger one prevails. c. They add together. d. Their sum divided by two is the total
force.
Friction a. The force that one surface exerts on
another when the two rub against each otherb. Change in velocity over time
d. Amount of force put on an area
An example of deceleration?
a. a bird taking off for flight b. a baseball released by a pitcher c. a bike approaching a stop sign d. an airplane following a straight flight
path
When an object’s distance from another object is changing
a. it is in motion. b. it is speeding. c. it has a high velocity. d. it is accelerating.
According to the law of conservation of momentum
a. velocity increase. b. velocity decreases. c. momentum is not lost.
A place or object used for comparison to determine if something is in motion is called
a. a constant. b. a reference point. c. a position. d. velocity.
The momentum of an object is in the same direction as its a. force. b. acceleration. c. velocity. d. inertia.