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WorksheetsUnit 2 Energy
Total questions: 26
Worksheet time: 14mins
Rene notices a leaf that has fallen onto the grass. Although a light breeze is blowing, the leaf is not moving. How can this be explained in terms of the forces that are acting on the leaf?
The forces on the leaf are balanced
The normal force on the leaf is stronger than gravity
The elastic force is stronger than the tension force.
The leaf has a small mass
Students attached two spring scales together. One student pulled one of the scales to the left. Another student pulled the other scale to the right. If the force on one scale is 4 N, what is the reading on the other scale?
0 N
2 N
4 N
8 N
A person who weighs 500 N on Earth would weigh about 80 N on the Moon. The force of gravity is less on the moon because?
a person loses mass when traveling to the moon
the moon is far away
the moon has less mass than earth
scales don't work on the moon
Young soccer players usually use a small-sized soccer ball. Which explains why the smaller ball needs less force to accelerate it?
it can remain in motion longer in one direction
it has more friction from the ground
it can reach higher velocities
it has less mass
A brick exerts a force of 20 newtons on the ground. If someone used their foot to push down on the brick with an additional 15 newtons, what is the amount of force that the ground exerts on the brick?
15 newtons upwards
20 newtons downwards
35 newtons upwards
35 newtons downwards
Rhonda rides her bike along a straight bike path heading north. She travels 15 meters in 3 seconds. What is her velocity?
5 m/s north
5 m/s south
15 m/s north
15 m/s south
Which is the force that acts whenever two surfaces or objects move past one another?
gravity
friction
magnetism
non contact force
Michael pushes a box to the east with a force of 15.4 newtons. Sandy and Kelly push the box toward the west. Sandy and Kelly each push with a force of 9.2 newtons. What is the net force on the box?
3.0 newtons, to the east
3.0 newtons, to the west
6.2 newtons, to the east
33.8 newtons, to the west
Different forces are applied to two different objects that have the same mass. What will happen?
neither object will move
both objects will move the same distance
the objects pushed with less force will move farther
the objects pushed with more force will move farther
Addriene leans against a wall. Which is NOT a force acting on the wall?
gravity
normal force upwards
horizontal force against the wall
tension force
Terry pushes a sofa across a carpeted floor. What could he do to reduce the force of friction that slows his progress?
Push hard on the sofa
Place smooth plastic cards under the sofa's legs
Push the sofa faster
Ask a friend to help push the sofa
A scientist is measuring the velocity of a comet as is travels toward the Sun. What information does she need to determine the velocity of a comet?
the mass of the comet
the mass and the speed of the comet
the speed and direction the comet is traveling
the mass, speed, and direction the comet is traveling
When an archer shoots an arrow, the arrow travels 200 m until it lands on the ground. Which explains why the arrow stops?
Objects that are moving tend to slow down and stop over time
The force of gravity stopped it
The force of gravity pulled it down, and a force from Earth stopped it
The archer didn’t shoot the arrow with enough force.
Which explains why friction is a contact force?
friction slows objects down
there are different types of friction
friction cannot be prevented
friction acts whenever two objects move past one another
A shopper pushes a cart loaded with 20 kg of groceries. The cart has a mass of 20 kg. If the shopper pushed with a force of 40 N, what would be the acceleration of the cart?
0.5 m/s2
1 m/s2
2 m/s2
10 m/s2
An airplane is heading north to Chicago from Louisiana, and a strong wind pushed from the west. In which direction will the airplane travel?
northwest
northeast
southwest
southeast
After stepping into a mud puddle, Susan stomps her shoes on the ground to remove some of the mud from them. Which explains why the mud comes off her shoes?
mud has less mass than the shoes
the mud continues in motion even after the shoe stops
mud tends to travel farther
the mud has more momentum
A student uses a force of 40 N to push a crate across the kitchen floor and friction resists with a force of 10 N. What is the net force of the crate?
30 N
40 N
50 N
400 N
Sherry installs identical motors into a one-seater go-kart and a heavier, two-seater go-kart. Which will have more acceleration?
The one-seater will have more acceleration because it has less mass
The two-seater will have more acceleration because is has more mass
There will be no difference since the motors are identical
There will be no difference since acceleration is constant
During which span of time was the cheetah’s acceleration negative?
A
B
C
D
What does the graph show about the rollerbladers motion?
He turned right
His speed was not constant
He stopped several times
His speed never changed
Which runner had the greatest speed?
Jan
Mitch
Ellisa
Corey
What would happen to the motion of the car if its brakes failed and the car started rolling down the hill?
Its acceleration would stay constant
Its velocity would stay constant
Its speed would stay constant
Its position would stay constant
What other information would the students need to calculate their velocities?
How long they stopped each time
The distance traveled
The direction in which they traveled and the distance traveled
The speed of the wind that day
An airplane is approaching a runway for a landing. Using the model below explain if the forces acting on the airplane are balanced or unbalanced?
The forces are balanced because the plane slows its speed to make a landing
The forces are unbalanced because the plane slows its speed to make a landing
An airplane is approaching a runway for a landing. Which has the greater force?
Lift
Gravity
