MOTION
In order to calculate the average speed, you must a) add distance and time b) subtract the total amount of distance and by the total amount of time c) add speed plus direction d) divide the total amount of distance by the total amount of time
d) divide the total amount of distance by the total amount of time
What is a place or an object used for comparison to determine if an object is in motion? a) reference point b) constant speed c) velocity d) distance
a) reference point
Where does the potential energy has the minimum value? a) at height = 20 m b) surface of the Earth c) at height = 1 m d) at the geostationary orbit
b) surface of the Earth
An object that is in free fall seems to be a) not moving b) slowed by air resistance c) speeded up by air resistance d) weightless
a) not moving
Inertia varies depending on a) velocity b) motion c) mass d) force
c) mass
What would the graph (distance vs. time) of no motion look like? a) a horizontal line b) the slope of the line increasing steadily c) the slope of the line decreasing steadily d) the line of the graph would increase and decrease.
a) a horizontal line
A ____________ is a push or pull that causes an object to change its motion. a) force b) change c) kinetic d) compound
a) force
When you kick a soccer ball it has __________ energy. a) kinetic b) potential c) mechanical d) chemical
a) kinetic
The unit of momentum is a) kg*m b) kg*m/s c) kg*m/s^2 d) m/s^2
b) kg*m/s
The SI unit that is used to measure time is the a) second b) minute c) hour d) nanosecond
a) second
What does constant speed look like on a graph (speed vs. time)? a) a horizontal line b) the slope of the line would increase. It would be a straight line. c) The slope of the line would decrease. d) The slope of the line would increase, decrease, and then become horizontal.
a) a horizontal line
Energy is the ability to do ________. a) nothing b) potential c) inertia d) work
d) work
The upward force of an object falling through the air is a) inertia b) air resistance c) momentum d) terminal velocity
b) air resistance
If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____. a) go straight up b) fall straight down c) follow a curved path d) travel horizontally
d) travel horizontally
A horizontal line on a velocity/time graph shows ________ acceleration a) zero b) positive c) changing d) negative
a) zero
A car went 100 miles in 2 hours. What is the average speed of the car? a) 50 km/hour b) 200 miles/hour c) 50 miles/hour d) 100 km/hour
c) 50 miles/hour
A ball held at rest at the top of a slide has ________________. a) potential energy b) kinetic energy c) work d) chemical energy
a) potential energy
The path of a projectile is a) curved b) always horizontal c) always vertical d) straight
a) curved
The statement "to every action there is an equal and opposite reaction" is ____. a) The law of conservation of momentum b) Newton's first law of motion c) Newton's second law of motion d) Newton's third law of motion
d) Newton's third law of motion
3 m/s north is an example of a) position b) momentum c) velocity d) acceleration
c) velocity
What type of force happens when objects rub against each other? a) magnetic force b) contact force c) gravitational force d) frictional force
d) frictional force
_____________ is the tendency of an object to keep moving or stay at rest. a) friction b) force c) inertia d) gravity
c) inertia
The size of the gravitational forces between two objects depends on their a) frictional forces b) inertia c) masses and distance between them d) speed and direction
c) masses and distance between them
When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called ____ forces. a) action-reaction b) centripetal c) frictional d) gravitational
a) action-reaction
Suppose you’re driving at the speed of 20 m/s and suddenly see red police lights and need to pull over, taking 20 seconds to come to a stop. What was your average acceleration? a) 1 m/s^2 b) 4 m/s^2 c) -1 m/s^2 d) -4 m/s^2
c) -1 m/s^2