Forces
A pencil falls off of a desk. What moves the pencil toward the floor?
A) mass
B) friction
C) gravity
D) speed
What is true about Blanca’s speed as she walked?
A) Bianca’s speed increased, then decreased.
B) Bianca’s speed decreased as she walked.
C) Bianca’s speed increased as she walked.
D) Bianca walked at a constant speed.
Two students are pushing on opposite sides of a box with equal force.
Which statement best describes what will happen?
A) The box will not move.
B) The box will move toward student 1.
C) The box will move toward student 2.
D) The box will slowly turn in place.
Which is the best example of unbalanced forces acting on an object?
A) a boy sitting on a chair
B) a dog holding a ball in its mouth
C) a girl jumping off a skateboard
D) a marble rolling at a constant speed
During which of the following time ranges is the car stopped?
A) 11:00 – 12:30
B) 9:00 – 9:30
C) 12:30 – 13:00
D) 10:30 – 11:00
Otto pushed a toy car across a floor. The car traveled fast across the wood, but it slowed to a stop on the carpet. Which best explains what happened when the car reached the carpet?
A) inertia decreased
B) gravity increased
C) friction increased
D) magnetism decreased
Jared is designing a bicycle ramp. He wants to make sure that his ramp is safe to use, so he wants to add a material that will increase friction as he rides down the ramp. Which material should Jared use on his ramp?
A) shiny metal
B) rough paper
C) smooth wood
D) wet plastic
A train travels 100 meters in 10 seconds. It travels 300 meters in the next 10 seconds. By 30 seconds, it has traveled 900 meters. Which best describes the motion of the train?
A) It is accelerating.
B) It is decelerating.
C)Its speed cannot be measured.
D) It is at a constant speed.
A)
The table shows the weights of several students.
Name Weight
Daniel 100 pounds
Maria 89 pounds
Sally 93 pounds
Tyler 97 pounds
Which student requires the most force to move his or her body?
A) Daniel
B) Maria
C) Sally
D) Tyler
If each ball is moving with the same speed, which would have the most momentum?
A) soccer ball
B) tennis ball
C) basketball
D) golf ball
A car traveled 60 miles in one hour, while a bus traveled 120 miles in two hours. Which best describes the motion of the vehicles?
A) They traveled the same distance.
B) They were accelerating.
C) They traveled in the same direction.
D) They traveled at the same average speed.
A group of students are investigating motion using a toy car, a ramp, and a milk carton. The students place an empty milk carton at the bottom of a ramp.
Which diagram shows where on the ramp the students should release the car to push the milk carton the farthest?
What can the students do to increase the speed that the marble will roll down the ramp?
A) add a layer of carpet to the ramp
B) lower the height of the ramp
C) use a longer board for the ramp
D) replace the board with a smoother board for the ramp
D) replace the board with a smoother board for the ramp
It took 20 minutes for a truck to travel from the beginning of the road at 0 km to Checkpoint A.
If a truck continues moving at the same speed, what will be true about the time it takes the car to reach Checkpoint B?
A) It will take the car 20 minutes to go from point A to point B.
B) It will take the car less than 20 minutes to go from point A to point B.
C) It will take the car more than 20 minutes to go from point A to point B.
D) It will take the car 40 minutes to go from point A to point B.
C) It will take the car more than 20 minutes to go from point A to point B.
Two identical balls are pushed with the same force. One ball is pushed along a flat surface and the other ball is pushed down a slanted surface. Which ball will travel faster and why?
A) the ball on the slanted surface, because of decreased friction
B) the ball on the slanted surface, because of increased gravity
C) the ball on the flat surface, because of decreased gravity
D) the ball on the flat surface, because of increased friction