Question 1
The distance between an object and a reference point is the object's ______
A. displacement
B. Neutral point
C. Position
D. Velocity
A. Displacement
_____ is the speed of an object at any given time.
a. acceleration
b. average speed
c. instantaneous speed
d. velocity
C. instantaneous speed
________ Measures an object's tendency to resist changing its motion.
a. acceleration
b. gravity
c. inertia
d. mass
c. inertia
The _ is the combination of all the forces acting on an object.
a. force of gravity
b. force pair
c. inertia
d. net force
d. net force
A region around an object in which each is affected by a force.
a. weight
b. field
c. centripetal acceleration
b. field
This force causes projectiles to follow a curved path.
a. acceleration
b. circumference
c. gravity
d. mass
Which two factors are needed to calculate velocity?
a. displacement and speed
b. speed and distance
c. acceleration and distance
d. speed and direction
d. speed and direction
Which term best describes the forces on an object with a net force of zero?
a. balanced forces
b. unbalanced forces
c. inertia
d. acceleration
a. balanced forces
Which of Newton's laws says the passengers in a car will continue to travel at the same velocity the car was moving unless a force acts on them?
a. Newton's 3rd law
b. Newton's 2nd Law
c. Newton's 1st law
C. Newton's 1st law
In which direction is centripetal force?
a. upward
b. downward
c. toward the center of a circle
d. toward the edges of a circle
c. toward the center of a circle
if an object has a constant velocity then it __
a. has a negative acceleration
b. has no acceleration
c. has a positive acceleration
b. has no acceleration
A change in velocity means a change in _____.
a. direction only
b. speed only
c. speed, direction, or both
d. always both speed and direction
c. speed, direction, or both
How does the gravitational force change as two objects move farther apart?
a. it increases
b. it decreases
c. it remains constant
b. it decreases
What is the gravitational force exerted on an object called?
a. centripetal force
b. mass
c. momentum
d. weight
d. weight
Which of the following is a force?
a. friction
b. acceleration
c. inertia
d. velocity
a. friction
Which of the following describes newton's third law of motion?
a. for every action force there is an equal and opposite reaction force
b. an object at rest will stay at rest and an object in motion will stay in motion unless acted on by outside force
A.
Two balls at the same height are released at the same time. The first ball hits the ground after 5 seconds. The second ball was thrown horizontally. When does the second ball hit the ground?
The same time as the first ball.
Find your mass if a scale on earth reads 650 N when you stand on it.
66 kg
Which of the following would cause the gravitational force between object a and object b to increase?
a. increase the mass of object a
b. increase the distance between them
c. decrease the mass of object a
d. decrease the mass of both objects
A. increase the mass of object a
__ relates the net force exerted on an object to its mass and acceleration.
a. newton's 1st law
b. newton's 2nd law
c. newton's 3rd law
b. newton's 2nd law
If a runner maintains a constant speed of 12 km/h, how long will it take to complete a marathon race of 26.2 kilometers?
a. 2.18 h
b. 3.14 h
c. 3.52 h
a. 2.18 h
as you brake your bicycle your velocity changes from 20 m/s east to 10 m/s east in 5 seconds. what is your acceleration?
A. 10 m/s west
B. 2 m/s east
c. 2 m/s west
d. 10 m/s east
b. 2 m/s east
You weigh yourself at the top of a high mountain and the scale reads 728 N. If your mass is 75 kg, what is the gravitational strength at your location?
9.7 or 9.8