A student claims that hitting a tennis ball across the court is an example of balanced forces. Is he correct?(1 point) Responses No, because equal forces act on the ball from all sides. No, because equal forces act on the ball from all sides. Yes, because the force in the direction of the ball’s motion is greater. Yes, because the force in the direction of the ball’s motion is greater. Yes, because equal forces act on the ball from all sides. Yes, because equal forces act on the ball from all sides. No, because the force in the direction of the ball’s motion is greater. No, because the force in the direction of the ball’s motion is greater.
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No, because the force in the direction of the ball’s motion is greater.
Without being able to see the graph, I am unable to determine which statement is true. Please provide the graph so that I can provide an accurate response.
The distance traveled and the time spent are required to measure average speed.
The graph below depicts an object’s distance traveled over several intervals of time. Which option correctly lists the motion of the object for each time interval? (1 point) Responses interval AB → no motion interval BC → decreasing speed interval CD → constant speed interval DE → acceleration interval AB → no motion interval BC → decreasing speed interval CD → constant speed interval DE → acceleration interval AB → constant speed interval BC → decreasing speed interval CD → constant speed interval DE → increasing speed interval AB → constant speed interval BC → decreasing speed interval CD → constant speed interval DE → increasing speed interval AB → no motion interval BC → constant speed interval CD → no motion interval DE → acceleration interval AB → no motion interval BC → constant speed interval CD → no motion interval DE → acceleration interval AB → constant speed interval BC → acceleration interval CD → constant speed interval DE → no motion
interval AB → no motion
interval BC → decreasing speed
interval CD → constant speed
interval DE → acceleration
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 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 A has more mass and takes less friction to lift. Box B has more mass and takes less force to lift.
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. Gravity is a net force acting on the book in a downward direction. Gravity is a net force acting on the book in a downward direction. 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.
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 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 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 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.
what is the correct answer?
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 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 upward force resists gravity’s downward force. The parachute’s upward force resists gravity’s downward force. The parachute’s upward force resists gravity’s upward force. The parachute’s upward force resists gravity’s upward force. The parachute’s downward force resists gravity’s upward force. The parachute’s downward force resists gravity’s upward force. The parachute’s downward force resists gravity’s downward force.
The parachute's upward force resists gravity's downward force.
A student walks east 100 meters in 2 minutes. She then walks north 200 meters in 4 minutes. Which statement is true?(1 point) Responses Her velocity is constant because her speed is constant. Her velocity is constant because her speed is constant. Her velocity changes because her speed varies. Her velocity changes because her speed varies. Her velocity changes because her direction changes. Her velocity changes because her direction changes. Her velocity is constant because her direction is constant.
Her velocity changes because her direction changes.
Hector went to the music store by heading due south at 3 m/s, then turning West and continuing at the same speed for another three blocks. Which of the following is true about Hector's velocity?(1 point) Responses Hector's velocity did not change because his speed did not change. Hector's velocity did not change because his speed did not change. Hector's velocity changed because his speed changed. Hector's velocity changed because his speed changed. Hector's velocity changed because his direction changed. Hector's velocity changed because his direction changed. Hector's velocity did not change because his direction did not change.
Hector's velocity changed because his direction changed.
The graph shows a bicycle rider's motion during the first portion of a race. What conclusion can be drawn about the rider's motion in the provided graph? (1 point) Responses The rider slowed down during the time period between 15 and 20 seconds. The rider slowed down during the time period between 15 and 20 seconds. The rider maintained a constant speed during the time period between 0 and 20 seconds. The rider maintained a constant speed during the time period between 0 and 20 seconds. The rider did not move during the time period between 10 and 15 seconds The rider did not move during the time period between 10 and 15 seconds The rider rode downhill during the time period between 15 and 20 seconds.
The rider maintained a constant speed during the time period between 0 and 20 seconds.
A car that is traveling west at a constant rate has(1 point) Responses speed, but neither velocity nor acceleration. speed, but neither velocity nor acceleration. acceleration and speed, but no velocity. acceleration and speed, but no velocity. speed and velocity, but no acceleration. speed and velocity, but no acceleration. velocity, but neither acceleration nor speed.
speed and velocity, but no acceleration.
A student is investigating mass and acceleration. The student applies the same force to two boxes, as shown in the table. The student claims that box 1 must have a smaller mass than box 2. Which argument best supports the student's claim?(1 point) Responses Heavier objects need greater force than lighter objects to accelerate at the same rate. Heavier objects need greater force than lighter objects to accelerate at the same rate. Lighter objects need greater force than heavier objects to start moving but will accelerate at the same rate. Lighter objects need greater force than heavier objects to start moving but will accelerate at the same rate. Heavier objects need less force than lighter objects to accelerate at the same rate. Heavier objects need less force than lighter objects to accelerate at the same rate. Lighter objects need less force than heavier objects to start moving but will accelerate at the same rate. Lighter objects need less force than heavier objects to start moving but will accelerate at the same rate.
Heavier objects need greater force than lighter objects to accelerate at the same rate.
While playing her soccer game, Samantha runs down the field at 10 meters per second. She has a constant speed and does not change direction. What is Samantha’s acceleration?(1 point) Responses The acceleration is 10 m/s^2 because her velocity increased. The acceleration is 10 m/s^2 because her velocity increased. The acceleration is 0 m/s^2 because her velocity did not change. The acceleration is 0 m/s^2 because her velocity did not change. The acceleration is 0 m/s^2 because her velocity increased. The acceleration is 0 m/s^2 because her velocity increased. The acceleration is 10 m/s^2 because her velocity did not change.
The acceleration is 0 m/s^2 because her velocity did not change.
Two forces act on an object. One force has a magnitude of 10 N directed north, and the other force has a magnitude of 2 N directed south. What is the net force on the object?(1 point) Responses 12 N south 12 N south 8 N south 8 N south 8 N north 8 N north 25 N north
The net force on the object is 8 N north.
An object at rest remains at rest. An object in motion remains in motion unless acted upon by an outside force. This describes which of Newton’s Laws of Motion?(1 point) Responses Second Law of Motion Second Law of Motion First Law of Motion First Law of Motion Second and Third Laws of Motion Second and Third Laws of Motion First and Third Laws of Motion
First Law of Motion
The picture shows a physics lab setup. Why does the disk fall straight down into the glass when the index card is quickly pulled away from the glass in a horizontal direction? (1 point) Responses Equilibrium Equilibrium Static friction Static friction Kinetic friction Kinetic friction Inertia Inertia
Inertia
Suppose 25 children who weigh the same are playing a game of tug-of-war. Five children pull with 10 newtons of force, while ten children pull with 15 newtons of force in the opposite direction. How can one determine the net force on the rope?(1 point) Responses The newtons are in the same direction, so the newtons can be multiplied. The newtons are in the same direction, so the newtons can be multiplied. The forces are in the same direction, so the newtons can be added. The forces are in the same direction, so the newtons can be added. The forces are in opposite directions, so the newtons can be divided. The forces are in opposite directions, so the newtons can be divided. The forces are in opposite directions, so the newtons can be subtracted.
The forces are in opposite directions, so the newtons can be subtracted.
Question The graph above shows an object’s motion. Which statement is true? (1 point) Responses The object accelerates at an increasing rate. The object accelerates at an increasing rate. The object does not move. The object does not move. The object accelerates at an increasing rate followed by a decreasing rate. The object accelerates at an increasing rate followed by a decreasing rate. The object starts at rest and then accelerates at a constant rate.
The object starts at rest and then accelerates at a constant rate.
The graph below shows a car’s motion. Which statement is true? (1 point) Responses The car traveled back to its starting point. The car traveled back to its starting point. The total time spent was 45 minutes. The total time spent was 45 minutes. The car’s speed was not constant. The car’s speed was not constant. The car never slowed down.
To measure average speed, what data is required?(1 point) Responses The direction of travel and the weight of the bike The direction of travel and the weight of the bike The distance traveled and the time spent The distance traveled and the time spent The direction and the distance of travel The direction and the distance of travel The weight of the bike and the time spent
The graphs below depict different cars moving on a straight road. Which graph shows a car that is not in motion? (1 point) Responses A A B B C C D D
what is the answer ?
Which example shows an object acted on by two balanced forces?(1 point) Responses A baseball rolling to a stop A baseball rolling to a stop A car moving at a constant speed in a constant direction A car moving at a constant speed in a constant direction A snowflake landing on a roof A snowflake landing on a roof A skateboard rolling down a hill with increasing speed
A car moving at a constant speed in a constant direction.
Speed, unlike acceleration or velocity, does NOT specify _______.(1 point) Responses Distance Distance Mass Mass Direction Direction Time
Direction
To measure average speed, what data is required?(1 point) Responses The weight of the bike and the time spent The weight of the bike and the time spent The direction and the distance of travel The direction and the distance of travel The direction of travel and the weight of the bike The direction of travel and the weight of the bike The distance traveled and the time spent
The distance traveled and the time spent are required to measure average speed.
No, because equal forces act on the ball from all sides.
The correct answer is "No, because equal forces act on the ball from all sides."
To understand why, we need to look at the concept of balanced forces. Balanced forces occur when the forces acting on an object are equal in magnitude and opposite in direction. As a result, the object remains at rest or continues to move at a constant velocity.
In the case of hitting a tennis ball across the court, the forces acting on the ball are not balanced. When a player strikes the ball, they apply a force in one direction. However, there are other forces acting on the ball, such as air resistance and gravity. These forces, including those from the player', are not equal and opposite, and therefore the forces are not balanced.
Therefore, the statement that hitting a tennis ball across the court is an example of balanced forces is incorrect.