What does the slope of a line mean on a position-time graph?
It represents the velocity of the object.
It represents the distance the object has traveled.
It represents the displacement of the object.
It represents the acceleration of the object.
The correct answer is: It represents the velocity of the object.
A baseball has a mass of 145 g. A pitcher throws the baseball so that it accelerates at a rate of 80 m/s2. How much force did the pitcher apply to the baseball?
11.6 N
1.8 N
0.6 N
65 N
To determine the force applied to the baseball, we can use Newton's second law of motion, which states that force (F) is equal to the mass (m) of an object multiplied by its acceleration (a).
F = m * a
First, we need to convert the mass of the baseball from grams to kilograms:
mass (m) = 145 g = 0.145 kg
Now we can calculate the force:
F = (0.145 kg) * (80 m/s^2)
F = 11.6 N
Therefore, the force applied to the baseball is 11.6 Newtons.
Two hockey pucks with the same mass are traveling toward each other, both moving at a speed of 5.6 m/s. Eventually, they collide. You can assume that no energy is lost during the collision. How will the motion of both hockey pucks change as a result of the collision? Both pucks will continue moving in the same direction they were before the collision. Both pucks will bounce back in the direction they came from. One puck will stop, and the other will continue moving. Both pucks will stop moving.
Both pucks will bounce back in the direction they came from.
This is because when two objects collide, they exert equal and opposite forces on each other according to Newton's third law of motion. The force from one puck on the other causes a change in momentum, resulting in both pucks changing their direction of motion. Since they have the same mass and are moving with the same speed in opposite directions, they will bounce off each other and continue moving in the opposite direction from which they came.
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? 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 opposite direction. 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 and in the same direction.
The hammer and the wall exert forces on each other that are equal in magnitude but in opposite directions.
According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When the sledgehammer hits the wall, it exerts a force on the wall. Simultaneously, the wall exerts an equal and opposite force on the sledgehammer. This means that the forces exerted by the hammer and the wall have the same magnitude but act in opposite directions.
Match the action with its reaction. 1. A tennis racquet swings to the left and hits a moving tennis ball. 2. A tennis racquet swings to the right and hits a moving tennis ball. 3. A tennis racquet hits a moving tennis ball with 120 newtons of force. 4. A swinging tennis racquet hits a moving tennis ball with 500 newtons of force. a. A tennis ball exerts a force of 120 newtons. b. A tennis ball exerts a force of 500 newtons. c. A tennis ball moves to the right. d. A tennis ball moves to the left.
1. A tennis racquet swings to the left and hits a moving tennis ball.
b. A tennis ball exerts a force of 500 newtons.
d. A tennis ball moves to the left.
2. A tennis racquet swings to the right and hits a moving tennis ball.
b. A tennis ball exerts a force of 500 newtons.
c. A tennis ball moves to the right.
3. A tennis racquet hits a moving tennis ball with 120 newtons of force.
a. A tennis ball exerts a force of 120 newtons.
4. A swinging tennis racquet hits a moving tennis ball with 500 newtons of force.
b. A tennis ball exerts a force of 500 newtons.