What is true about the forces on a car stopped at a red light?(1 point)
23 answers
The forces on a car stopped at a red light are balanced and the net force on the car is zero.
Is this right?
Yes, that is correct. When a car is stopped at a red light, the forces acting on it, such as gravity and the normal force from the ground, are balanced. As a result, the net force on the car is zero.
A book rests on a table inside a house. What forces are acting on the book to keep it at rest?(1 point)
The forces acting on the book to keep it at rest are the force of gravity pulling the book downward and the normal force exerted by the table pushing upward. These two forces are equal in magnitude and opposite in direction, resulting in a net force of zero and keeping the book at rest.
Which item has unbalanced forces acting on it?(1 point)
Responses
Responses
Without specific items listed to choose from, it is not possible to determine which item has unbalanced forces acting on it. Please provide a list of items to choose from.
a tall bridge over a river
a tall bridge over a river
a car parked in a garage
a car parked in a garage
heavy books stacked on a table
heavy books stacked on a table
water turning a waterwheel
a tall bridge over a river
a car parked in a garage
a car parked in a garage
heavy books stacked on a table
heavy books stacked on a table
water turning a waterwheel
The water turning a waterwheel has unbalanced forces acting on it. As the flowing water pushes against the waterwheel, it exerts a force on the wheel, causing it to rotate. This rotation creates an unbalanced force on the waterwheel, allowing it to do work by converting the flow of water into mechanical energy.
What is true about the forces on a car stopped at a red light?(1 point)
Only gravity acts on the car because it is at rest.
Only gravity acts on the car because it is at rest.
The forces acting on the car are equal because it is at rest.
The forces acting on the car are equal because it is at rest.
There are no forces acting on the car because it is at rest.
There are no forces acting on the car because it is at rest.
The forces acting on the car are unequal because it is at rest.
Only gravity acts on the car because it is at rest.
Only gravity acts on the car because it is at rest.
The forces acting on the car are equal because it is at rest.
The forces acting on the car are equal because it is at rest.
There are no forces acting on the car because it is at rest.
There are no forces acting on the car because it is at rest.
The forces acting on the car are unequal because it is at rest.
The forces acting on the car are equal because it is at rest.
A book rests on a table inside a house. What forces are acting on the book to keep it at rest?
force of the table and force of sound on the book
force of the table and force of sound on the book
force of gravity and force of the table on the book
force of gravity and force of the table on the book
force of the table and force of wind on the book
force of the table and force of wind on the book
force of gravity and force of sound on the book
force of the table and force of sound on the book
force of the table and force of sound on the book
force of gravity and force of the table on the book
force of gravity and force of the table on the book
force of the table and force of wind on the book
force of the table and force of wind on the book
force of gravity and force of sound on the book
The correct answer is: force of gravity and force of the table on the book.
Jenny's team is pulling against Jeremiah's team in tug of war. Both teams are pulling on the rope, but the rope is not moving. What statement best describes the forces acting on the rope?(1 point)
Responses
The forces are balanced because both sides are pulling with the same force.
The forces are balanced because both sides are pulling with the same force.
The forces are balanced because one side is pulling with less force.
The forces are balanced because one side is pulling with less force.
The forces are unbalanced because one side is pulling with more force.
The forces are unbalanced because one side is pulling with more force.
The forces are unbalanced because both sides are pulling with the same force.
Responses
The forces are balanced because both sides are pulling with the same force.
The forces are balanced because both sides are pulling with the same force.
The forces are balanced because one side is pulling with less force.
The forces are balanced because one side is pulling with less force.
The forces are unbalanced because one side is pulling with more force.
The forces are unbalanced because one side is pulling with more force.
The forces are unbalanced because both sides are pulling with the same force.
The forces are balanced because both sides are pulling with the same force.
Maria, Jose, and Tyrone drop basketballs from different heights, in feet. Then, they measure how high, in feet, each basketball bounces after it hits the ground. The table shows the measurements.
Maria's Ball Jose's Ball Tyrone's Ball
Drop Height (in feet) 14 5 9
Bounce Height (in feet) 11 3 ?
Maria's Ball Jose's Ball Tyrone's Ball
Drop Height (in feet) 14 5 9
Bounce Height (in feet) 11 3 ?
Based on the given information, the bounce height of Tyrone's ball is missing.
How high is Tyrone's basketball likely to bounce after being dropped?
(1 point)
Responses
2 feet
2 feet
7 feet
7 feet
3 feet
3 feet
10 feet
(1 point)
Responses
2 feet
2 feet
7 feet
7 feet
3 feet
3 feet
10 feet
Based on the given information, it is not possible to determine the height to which Tyrone's basketball is likely to bounce after being dropped since the bounce height for Tyrone's ball is missing from the table.
Maria, Jose, and Tyrone drop basketballs from different heights, in feet. Then, they measure how high, in feet, each basketball bounces after it hits the ground. The table shows the measurements.
Maria's Ball Jose's Ball Tyrone's Ball
Drop Height (in feet) 14 5 9
Bounce Height (in feet) 11 3 ?
How high is Tyrone's basketball likely to bounce after being dropped?
(1 point)
Responses
2 feet
2 feet
7 feet
7 feet
3 feet
3 feet
10 feet
anonymous
Maria's Ball Jose's Ball Tyrone's Ball
Drop Height (in feet) 14 5 9
Bounce Height (in feet) 11 3 ?
How high is Tyrone's basketball likely to bounce after being dropped?
(1 point)
Responses
2 feet
2 feet
7 feet
7 feet
3 feet
3 feet
10 feet
anonymous
Based on the given information, the bounce height of Tyrone's ball is not provided. Therefore, we cannot determine how high Tyrone's basketball is likely to bounce after being dropped.
Chen has a toy car and wants to find out which surface will allow the car to move the fastest. He plans to push the car on carpet, wood, and bricks. In 1-2 sentences, predict which surface the toy car will move the fastest on and why.(2 points)
The toy car will move the fastest on the smooth surface of wood because it offers less friction compared to the carpet or uneven surface of bricks, allowing the wheels to spin more easily and the car to move faster.
1 answer