Two postal delivery workers have different routes. They both travel from the post office, to neighborhoods to deliver mail, and then back to the post office. Which statement must be true about the two postal delivery workers?(1 point)
Responses
They have the same velocity.
They have the same velocity.
They each travel a distance of 0 miles.
They each travel a distance of 0 miles.
They each have a displacement of 0 miles.
They each have a displacement of 0 miles.
They travel the same distance.
Matt is walking at 1.25 miles per hour to the east. Jaime is walking at 1.25 miles per hour to the south. Which statement describes the movement of Matt and Jaime?(1 point)
Responses
They have the same speed and the same velocity.
They have the same speed and the same velocity.
They have different speeds and different velocities.
They have different speeds and different velocities.
They have the same speed but different velocities.
They have the same speed but different velocities.
They have different speeds but the same velocity.
What does a horizontal line on a position-time graph indicate about the object?(1 point)
Responses
The object is accelerating.
The object is accelerating.
The object has a position of zero.
The object has a position of zero.
The object remains still.
The object remains still.
The object has a constant, nonzero velocity.
They travel the same distance.
They have different speeds but the same velocity.
A force acts on an object. Which option describes an action that could prevent the object from moving?(1 point)
Responses
a force applied in the same direction with a greater magnitude at the same time
a force applied in the same direction with a greater magnitude at the same time
a force applied in the same direction with the same magnitude at the same time
a force applied in the same direction with the same magnitude at the same time
a force applied in the opposite direction with a greater magnitude at the same time
a force applied in the opposite direction with a greater magnitude at the same time
a force applied in the opposite direction with the same magnitude at the same time
a force applied in the opposite direction with the same magnitude at the same time
Which option is the force with the greatest magnitude?(1 point)
Responses
the force needed to lift a pencil
the force needed to lift a pencil
the force needed to lift a hairbrush
the force needed to lift a hairbrush
the force needed to lift a textbook
the force needed to lift a textbook
the force needed to lift a chair
The force needed to lift a textbook.
A box is against a wall. A person pushes on the box, but the box does not move. Is this situation an example of a force?(1 point)
Responses
No, this is not an example of a force because the box did not move.
No, this is not an example of a force because the box did not move.
Yes, this is an example of a force because gravity is pulling the box down.
Yes, this is an example of a force because gravity is pulling the box down.
No, this is not an example of a force because a force pulls an object.
No, this is not an example of a force because a force pulls an object.
Yes, this is an example of a force because a force is a push or pull.
Yes, this is an example of a force because a force is a push or pull.
Which situation describes a non-contact force changing the speed of an object?(1 point)
Responses
a drawer opening when a user pulls the handle
a drawer opening when a user pulls the handle
a gust of wind blowing a leaf away
a gust of wind blowing a leaf away
a bicycle accelerating as the rider pedals more quickly
a bicycle accelerating as the rider pedals more quickly
a ball accelerating as it rolls down a hill
a gust of wind blowing a leaf away
In which situation would the momentum of a moving object increase?(1 point)
Responses
Two forces of equal magnitude act on the object in opposite directions.
Two forces of equal magnitude act on the object in opposite directions.
A force acting in the direction opposite the object’s motion is removed from the object.
A force acting in the direction opposite the object’s motion is removed from the object.
A new force acts on the object, opposing the object’s motion.
A new force acts on the object, opposing the object’s motion.
A force acting in the direction of the object’s motion is removed from the object.
A force acting in the direction of the object’s motion is removed from the object.
A force acting in the direction of the object’s motion is removed from the object.
When you trip, your foot stops, but your body continues to move forward. Which statement best explains why this happens?(1 point)
Responses
a. An unbalanced force pushes your body forward.
An unbalanced force pushes your body forward.
b. Newton's Second Law of Motion pushes your body forward after your foot stops.
Newton's Second Law of Motion pushes your body forward after your foot stops.
c. The unbalanced force that stops your foot pulls your body forward.
The unbalanced force that stops your foot pulls your body forward.
d. An unbalanced force stops your foot but does not act on the rest of your body.
d. An unbalanced force stops your foot but does not act on the rest of your body.
A bowler throws a ball down the lane toward the pins. The ball reaches the pins and slowly moves through them, knocking down the center pins but leaving the end pins standing. The bowler wants the ball to reach all the pins. Which changes should the bowler make so that the ball has a greater acceleration?(1 point)
Responses
a. The bowler should choose a ball with less mass or throw the ball with more force.
The bowler should choose a ball with less mass or throw the ball with more force.
b. The bowler should choose a ball with more mass or throw the ball with more force.
The bowler should choose a ball with more mass or throw the ball with more force.
c. The bowler should choose a ball with more mass or throw the ball with less force.
The bowler should choose a ball with more mass or throw the ball with less force.
d. The bowler should choose a ball with less mass or throw the ball with less force.
a. The bowler should choose a ball with less mass or throw the ball with more force.
In which situation does the reactive force between two colliding objects cause a physical change?(1 point)
two bumper cars at an amusement park colliding, causing both cars to change direction
two bumper cars at an amusement park colliding, causing both cars to change direction
a swing hitting another swing, causing the second swing to move away
a swing hitting another swing, causing the second swing to move away
the exhaust from a rocket thrusting the rocket away from the ground
the exhaust from a rocket thrusting the rocket away from the ground
a baseball player swinging a bat and hitting a baseball, causing the bat to shatter
two bumper cars at an amusement park colliding, causing both cars to change direction
A sledgehammer is swung at a wall. Once the sledgehammer hits the wall it does not breakthrough. How do the hammer and the wall act on each other?(1 point)
a. The hammer exerts a stronger force than the wall but in the same direction.
The hammer exerts a stronger force than the wall but in the same direction.
b. The hammer and the wall exert forces on each other that are equal in magnitude and in the same direction.
The hammer and the wall exert forces on each other that are equal in magnitude and in the same direction.
c. The hammer and the wall exert forces on each other that are equal in magnitude but in opposite directions.
The hammer and the wall exert forces on each other that are equal in magnitude but in opposite directions.
d. The hammer exerts a stronger force than the wall but in the opposite direction.
c. The hammer and the wall exert forces on each other that are equal in magnitude but in opposite directions.
In T-ball, batters hit a ball that is placed on a T-shaped stand. Batter A hits the ball by swinging the bat from a resting position on his shoulder. Batter B hits the ball with the bat directly behind it. In one or two sentences, create and justify a claim about which batter will likely hit the ball the greater distance.(2 points)
Batter B is likely to hit the ball a greater distance because hitting the ball directly from behind generates a greater initial velocity and momentum transfer to the ball, leading to a stronger impact and longer travel distance.
A musician hits a drum with a drumstick. In three to four sentences, explain the collision forces between the drum and drumstick.(4 points)
When a musician hits a drum with a drumstick, there are two main forces involved in the collision. First, the drumstick exerts an impact force on the surface of the drum. This force is responsible for transferring energy from the drumstick to the drum, causing it to vibrate and produce sound. Secondly, the drum exerts a reaction force on the drumstick, which is equal in magnitude but opposite in direction to the impact force. This reaction force allows the drumstick to bounce back after hitting the drum, contributing to the musician's ability to play the drum repeatedly. Overall, the collision forces between the drum and drumstick involve an interaction of forces that enable the production of sound.
summarize
When a musician hits a drum with a drumstick, there are two main forces involved: the impact force exerted by the drumstick on the drum, and the reaction force exerted by the drum on the drumstick. The impact force transfers energy to the drum, causing it to vibrate and produce sound. The reaction force allows the drumstick to bounce back after hitting the drum, enabling the musician to play the drum repeatedly. These collision forces are fundamental to the production of sound in drumming.
@Bot
Now can you list all of the answers together and number them?