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WorksheetsForce and Motion Check #2
Total questions: 36
Worksheet time: 9hrs 0mins
A student uses the same force to push a golf ball, a ping pong ball, a bowling ball, and a baseball. Which will move the fastest?
the golf ball
the ping pong ball
the bowling ball
the baseball
Select all the scenarios in which more friction would be best.
a car going around a corner
ice skating
sliding down a sliding board
using brakes to stop a bike quickly
pushing a heavy box across a room
Select all the scenarios in which less friction would be best.
a car going around a corner
ice skating
sliding down a sliding board
using brakes to stop a bicycle quickly
pushing a heavy box across a room
A student is pushing a box of books across the floor. The student stops, removes some of the books, and then continues pushing the box across the floor. Which best explains how removing some of the books affected the motion of the object?
Removing some of the books reduced the mass of the box, and less force was needed to push it across the floor.
Removing some of the books reduced the mass of the box, and more force was needed to push it across the floor.
Removing some of the books did not affect the amount of force needed to push it across the floor.
Removing some of the books decreased the mass of the box, and the same amount of force was needed to push it across the floor.
Four cars are at the starting line of a race. Which car will require the most force to start moving?
car with mass of 1200 kilograms
car with mass of 1500 kilograms
car with mass of 1700 kilograms
car with mass of 2000 kilograms
Nick and Mike are facing each other on skateboards. They touch palms and push off from each other. Which best describes their movement?
Neither Nick nor Mike will move.
Nick and Mike will move backward away from each other.
Nick will move forward, and Mike will move backward in the same direction.
Nick will move backward, and Mike will move forward in the same direction.
A runner’s times for each section of a 400-meter race are shown in the data table above. Which best describes the runner’s motion over the course of the 400-meter race?
The runner’s speed increased.
The runner’s speed decreased.
The runner’s speed stayed the same.
The runner’s direction remained the same.
Mark and the chair are exerting the same amount of force on each other. Which will most likely happen to the chair?
It will move backward.
It will move forward.
It will move left.
It will stay still.
Team 1 and Team 2 each have five people who are pulling with equal force on opposite ends of a rope. Which will most likely happen if Team 1 stops pulling on the rope?
Team 1 will pull the rope closer to their side.
Team 2 will pull the rope closer to their side.
The rope will fall to the ground on both sides.
The rope will continue to be pulled in both directions.
Sam is building a car to race down a ramp. The car weighs 100 grams. Which could Sam do to increase the speed of the car?
increase the mass of the car
decrease the mass of the car
increase the friction on the ramp
How does the mass of an object affect acceleration?
The greater the mass of an object, the greater the force needed to accelerate the object.
The greater the mass of an object, the smaller the force needed to accelerate the object.
The smaller the mass of an object, the greater the force needed to decelerate the object.
How does friction affect speed?
more friction decreases speed
more friction increases speed
less friction decreases speed
Which best explains why a ball increases in speed as it rolls down a hill?
The ball increases in speed because of friction.
The ball increases in speed because of gravity.
The ball increases in speed because the mass changes.
Michael loads a wagon with wood. Which would most likely be the effect of adding more wood to the wagon?
The force of gravity acting on the wagon will increase.
The force of gravity acting on the wagon will decrease.
The amount of force required to move the wagon will increase.
A hot air balloon is floating in the atmosphere. If a burst of hot air were blown up into the balloon, which would most likely occur?
The balloon would rise.
The balloon would descend.
The balloon would travel sideways.
The balloon would remain in the same place.
Molly is trying to improve on hitting a softball. Which will most likely help to improve Molly’s hitting?
a lighter ball and a lighter bat
a heavier ball and a lighter bat
a lighter ball and a heavier bat
a heavier ball and a heavier bat
When two objects are dropped from the same height, they will land at the same time. Which best explains why this happens?
mass
friction
gravity
Which will most likely increase the speed of an object?
applying a faster force
applying a slower force
applying a weaker force
applying a stronger force
A book is lying on the dashboard of a car, which is stopped at a red light. Which is the most likely reason for the book to slide backward as the car begins to move forward?
The book has inertia.
The book has momentum.
The book has acceleration.
Two toy race cars are going to be raced down the same ramp. Which information is most helpful in predicting which car will win the race?
length of the ramp
volume of the cars
slope of the ramp
mass of the cars
A group of six people are on a boat. Three people are in the front and three people are in the back. The front of the boat is sinking lower than the back of the boat. Which best explains why the front of the boat is sinking lower?
There are heavier items in the back of the boat than in the front of the boat.
The pressure of the water is greater against the front of the boat.
The people in the front of the boat are closer together.
The people in the front of the boat are heavier.
Which is the best way to reduce the amount of friction on a plane?
use different fuel in the plane
change the shape of the plane
increase the speed of the plane
increase the weight of the plane
Which will most likely happen when additional forces act on a moving object?
The mass of the object will change.
The object will either speed up or slow down.
The object will begin moving at a constant speed.
The friction forces on the object will remain the same.
Mr. Smith’s class is experimenting with two toy cars that have the same mass. If one car is pushed harder than the other car is pushed, what will most likely happen?
The car that was pushed harder will be less affected by gravity.
The car that was pushed harder will be more affected by gravity.
The car that was pushed harder will travel farther than the other car.
The car that was pushed harder will not travel as far as the other car.
Ann goes down the slide at the playground. At the bottom, she slides off and stops. Which most likely explains why she stops moving?
The force of her hitting the ground causes the stop.
Without the slide under her, the ability to move disappears.
The energy needed for movement is used up on the slide.
The force pulling her forward is only the slide, not the ground.
On which surface will a toy truck travel the fastest?
a track sloping upward
a track that is completely flat
a track sloping gently downward
a track sloping steeply downward
What changes occur when an ice cube is heated to a temperature above 100°C?
The ice cube will change from a liquid to a solid.
The ice cube will change from a gas to a liquid.
The ice cube will change from a solid to a liquid to a gas.
The ice cube will change from a solid to a liquid and then back to a solid.
Jennifer left her bike outside, buried in snow. In the spring, when the snow melted, she found her bike covered in rust. Which best describes the change to the bike?
It was a chemical change, because the bike was a different color.
It was a chemical change, because the rubber tires were deflated.
It was a chemical change, because rust can be removed from the metal.
It was a chemical change, because rust is a new substance on the metal.
Some diving sea birds, such as puffins, often eat sand eels as their major source of food. What would most likely happen as a result of over-fishing sand eels?
The size of the sand eels would become larger.
The sand eels would move to fresh waters.
The sea birds would eat other sources of food.
The sea birds would move to other areas to hunt for sand eels.
Which best explains why producers are at the beginning of all food chains?
They turn dead animals into nutrients.
They provide shelter for smaller animals.
They transfer energy from the sun into food.
The local weather station is predicting that a warm front will pass through Charlotte, NC in two days. How will Charlotte’s weather most likely be affected by the passing of a warm front?
The wind speed will increase.
The air pressure will increase.
The temperature will increase.
Why do most storms move from the west coast of America to the east coast?
El Niño
La Niña
the jet stream
Which is true about sea breezes?
They form when both the land and the ocean have cooler temperatures.
They form when both the land and the ocean have warmer temperatures.
They form because the land warms up more quickly than the cooler ocean waters.
They form because the ocean warms up more quickly than the cooler land masses.
A student places a cup of cold water on a counter in a hot room. After a short time, the student notices that the water in the cup is no longer cold. Which best explains why the water in the cup is no longer cold?
The coldness of the water transferred to the air, making the water in the cup warmer.
The coldness of the water was conducted to the cup, making the water in the cup warmer.
The heat from the air transferred to the water in the cup, making the water in the cup warmer.
The heat from the air caused the cold water in the cup to condense, making the water warmer.
Which organism most directly converts the sun’s radiation into energy it can use?
grass
snake
human
mushroom
Which best explains why stainless steel is a good choice as a material to use when making pots and pans?
Stainless steel is a good insulator.
Stainless steel is a poor conductor of heat.
Stainless steel is a good conductor of heat.
