Forces And Motion Question Preview (ID: 42187)
Forces Motion Unit Review.
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A bird flies 50 meters in 10 seconds. What is its speed?
a) 0.2 seconds per meter
b) 0.2 meters per second
c) 5 seconds per meter
d) 5 meters per second
Which of the following is used to measure speed?
a) meters
b) seconds
c) seconds per meter
d) meters per second
A car is traveling south on the highway at 55 mph. It passes several road signs and a bus that is heading north on the same highway. Which reference point is best used for describing the motion of the car?
a) a tire on the bus
b) the driver of the car
c) the driver of the bus
d) a road sign beside the highway
What does it take to change the direction or speed of an object?
a) more than one force
b) an unbalanced force
c) a balanced force
d) no force
If there is no force acting on an object, it will______
a) move at the same speed
b) move in the same direction
c) move with the same speed AND direction
d) eventually slow down and stop
Which of the following describes (states) an object that is speeding up? The object is ________.
a) decelerating
b) accelerating
c) in a frictionless environment
d) moving with constant speed
A ball rolls across a smooth surface at a steady (constant) 0.5 meters per second (m/s). What is its acceleration?
a) 0
b) 9.8 m/s2
c) 0.5 m/s2
d) 2 m/s2
What is the force needed to accelerate a 10kg object at 2 m/s2?
a) 5 N
b) 2 N
c) 0.2 N
d) 20 N
A car accelerates down the road. What is the “reaction” to the tires pushing on the road?
a) the air in the tires moving the car
b) the mass of the car pushing on the tires
c) the road pushing on the tires
d) the road moving away from the tires
Imagine you could throw a ball in a frictionless environment such as outer space. Once you let go of the ball, what will have happened to the ball according to the Law of Inertia (Newton’s 1st Law)?
a) It will travel in a straight line forever.
b) It will travel in a straight line but eventually slow down.
c) It will continue to speed up forever.
d) It will slow down and turn.
How does Newton’s first law of motion apply to a ball rolling across the gym floor after an unbalanced force is applied?
a) The ball will stop at the line halfway across the gym.
b) The ball will continue to roll until an unbalanced force in applied.
c) The ball will start bouncing until it hits the wall.
d) The ball will roll in a zigzag pattern to the other end of the gym.
The law requires all people riding in a car to wear seat belts. If the car suddenly stops, the seat belts hold the passengers in place. How does Newton’s first law of motion apply when a person is not wearing a seat belt?
a) The passengers will continue moving forward due to inertia.
b) The passengers will move backward into the seat.
c) The passengers will lean into another passenger’s seat.
d) The passengers will not be affected by the sudden stop of the car.
When a car suddenly stops at a red light, a book lying on the car seat slides forward. Why does the book continue to move forward?
a) The book loses its backward force.
b) The car moves in reverse more rapidly than the book.
c) The friction of braking transfers energy to the book.
d) The book’s inertia causes it to continue moving.
A student drives 50 miles north from the starting line of a race, then drives 60 miles going south. Which best describes the student’s displacement from the starting line?
a) 10 miles south
b) 10 miles north
c) 110 miles south
d) 110 miles north
Which best describes the change in position of an object’s location compared to a reference point?
a) acceleration
b) motion
c) speed
d) vector
Mason is watching his friends race dirt bikes. Which proves his friends are in motion on their dirt bikes?
a) Each bike has six gears.
b) Each bike has mud on the tires.
c) Each bike just passed the finish line.
d) Each bike has a maximum speed of 60 mph.
Which is MOST likely needed when describing the change in position of an object?
a) initial speed
b) direction change
c) reference point
d) constant rate
Jerry saw a car parked in front of his house early in the day. Later that day, he saw the same car parked in front of a neighbor’s house that is two houses away from his house. How does Jerry know the car has moved?
a) Jerry assumed since it was later in the day, the car had moved.
b) Jerry compared the car’s present location with its past location.
c) Jerry guessed the neighbor ran errands and parked the car in a different location upon returning.
d) Jerry was told earlier in the day that the car would be moved, and he accepted this story as evidence.
David is new to Holly Middle School and was given a map to find his classes. He starts from the school office and walks south 50 meters to his science class. Which best represents David’s reference point?
a) map
b) 50 meters
c) school office
d) science class
A car moves at a constant speed of 40 mph for 20 minutes. The car stops for a train for 10 minutes, then resumes a constant speed of 40 mph for another 20 minutes. Which best describes the motion of the car over the 50-minute trip?
a) constant speed → constant speed → no motion
b) constant speed → no motion → constant speed
c) constant speed → increase of 10 mph → constant speed
d) no acceleration → increase of 40 mph → constant speed
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