A student is moving boxes. Box A and box B are the same size and shape . The student can lift box A, but not box B. What is the difference between the boxes?(1 point)
Responses
Box B has more mass and takes more force to lift.
Box B has more mass and takes more force to lift.
Box B has more mass and takes less force to lift.
Box B has more mass and takes less force to lift.
Box B has more mass and takes more friction to lift.
Box B has more mass and takes more friction to lift.
Box A has more mass and takes less friction to lift.
Box B has more mass and takes more force to lift.
The correct response is: Box B has more mass and takes more force to lift.
The correct answer is Box B has more mass and takes more force to lift.
To understand this, we need to consider the concept of mass and force. Mass refers to the amount of matter in an object, while force is a push or pull that can cause an object to move, accelerate, or stop.
In this scenario, we are told that Box A and Box B are the same size and shape. This means that their volumes are the same, so we can assume they have the same density. However, the student is able to lift Box A, but not Box B.
Since both boxes have the same size and shape, the factor that differentiates them is their mass. Mass is a measure of the amount of matter an object contains, and it directly affects the force required to lift it.
The student can lift Box A, indicating that it has a manageable mass. On the other hand, the student cannot lift Box B, implying that it has more mass and, consequently, requires more force to lift.
Therefore, the difference between the boxes is that Box B has more mass and takes more force to lift.
Why is a book resting on a table in a state of equilibrium?(1 point)
Responses
The book’s weight and the upward force the table exerts on the book have equal magnitude but opposing directions.
The book’s weight and the upward force the table exerts on the book have equal magnitude but opposing directions.
The book and the table both have acceleration (due to gravity) of 9.8 m/s/s.
The book and the table both have acceleration (due to gravity) of 9.8 m/s/s.
The book and the table have the same weight.
The book and the table have the same weight.
Gravity is a net force acting on the book in a downward direction.
The correct response is: The book’s weight and the upward force the table exerts on the book have equal magnitude but opposing directions.
A boy holds an apple as shown.
Why doesn’t gravity cause the apple to fall to the ground?
(1 point)
Responses
The force of his hand pushes up on the apple with greater magnitude than the force of gravity, which pulls down on the apple. The two forces are balanced, so the apple doesn't fall.
The force of his hand pushes up on the apple with greater magnitude than the force of gravity, which pulls down on the apple. The two forces are balanced, so the apple doesn't fall.
The force of his hand pushes up on the apple with equal magnitude to the force of gravity, which pulls down on the apple. The two forces are balanced, so the apple doesn't fall.
The force of his hand pushes up on the apple with equal magnitude to the force of gravity, which pulls down on the apple. The two forces are balanced, so the apple doesn't fall.
The force of his hand pushes up on the apple with equal magnitude to the force of gravity, which pulls down on the apple. The two forces are unbalanced, so the apple doesn't fall.
The force of his hand pushes up on the apple with equal magnitude to the force of gravity, which pulls down on the apple. The two forces are unbalanced, so the apple doesn't fall.
The force of his hand pushes up on the apple with greater magnitude than the force of gravity, which pulls down on the apple. The two forces are unbalanced, so the apple doesn't fall.
The correct response is: The force of his hand pushes up on the apple with greater magnitude than the force of gravity, which pulls down on the apple. The two forces are balanced, so the apple doesn't fall.
The spacecraft shown below weighs 6.1 million pounds. The rocket produces 7.5 million pounds of thrust.
When the spacecraft falls back to earth, a parachute helps it fall safely. Explain the forces acting during this landing.
(1 point)
Responses
The parachute’s downward force resists gravity’s downward force.
The parachute’s downward force resists gravity’s downward force.
The parachute’s downward force resists gravity’s upward force.
The parachute’s downward force resists gravity’s upward force.
The parachute’s upward force resists gravity’s upward force.
The parachute’s upward force resists gravity’s upward force.
The parachute’s upward force resists gravity’s downward force.
The correct response is: The parachute’s upward force resists gravity’s downward force.
During the landing of the spacecraft, the parachute is deployed to slow down the descent and provide a safe landing. The parachute creates drag, which opposes the force of gravity pulling the spacecraft downward. This upward force from the parachute helps counteract gravity's downward force and slows down the descent of the spacecraft. Therefore, the parachute's upward force resists gravity's downward force.
The spacecraft shown below weighs 6.1 million pounds. The rocket produces 7.5 million pounds of thrust.
When the spacecraft falls back to earth, a parachute helps it fall safely. Explain the forces acting during this landing.
(1 point)
Responses
The parachute’s downward force resists gravity’s downward force.
The parachute’s downward force resists gravity’s downward force.
The parachute’s downward force resists gravity’s upward force.
The parachute’s downward force resists gravity’s upward force.
The parachute’s upward force resists gravity’s upward force.
The parachute’s upward force resists gravity’s upward force.
The parachute’s upward force resists gravity’s downward force.