Which unit is used to measure force? (1 point)
• watt
• newton
• kilogram
• joule
newton
The unit used to measure force is the newton.
The unit used to measure force is the newton. To find the answer to this question, you can either refer to your physics textbook or search on the internet. Knowing some basic units of measurement is helpful in understanding the underlying principles of physics and engineering.
A baseball collides with a baseball glove. Which equation is used to calculate the force the glove exerts on the ball during the collision? (1 point)
• force = weight × acceleration
• force = mass × velocity
• force = mass × acceleration
• force = weight × velocity
The equation used to calculate the force the glove exerts on the ball during the collision is:
• force = mass × acceleration
A 0.2-kilogram softball is thrown toward a catcher's mitt. The ball is accelerating at a rate of 8 meters per second squared. With what force will the ball hit the catcher's mitt? (1 point)
• 7.8 N
• 8.2 N
• 1.6 N
• 40 N
To calculate the force with which the ball will hit the catcher's mitt, we can use the equation:
force = mass × acceleration
Given:
mass = 0.2 kg
acceleration = 8 m/s^2
Substituting the values into the equation, we get:
force = 0.2 kg × 8 m/s^2 = 1.6 N
Therefore, the force with which the ball will hit the catcher's mitt is 1.6 N.
A tennis player hits a 0. 1-kilogram tennis ball with her racket from the north end of a court. Her racket was traveling at 65 kilometers per hour. The ball accelerated at a rate of 10 meters per second squared. The ball hits the floor on the south end of the tennis court. The floor sends the ball toward the tennis player's opponent with the same acceleration.
How much force did the floor on the south end of the court exert on the ball? (1 point)
• 1 N
• 6.5 N
• 7.5 N
• 0.01 N
To find the force exerted by the floor on the ball, we can use the equation:
force = mass × acceleration
Given:
mass = 0.1 kg
acceleration = 10 m/s^2
Substituting the values into the equation, we get:
force = 0.1 kg × 10 m/s^2 = 1 N
Therefore, the force exerted by the floor on the ball is 1 N.
The wind blows a lawn chair that weighs 4 kg into a fence with a force of 8 N. How much reaction force does the fence exert on the chair? (1 point)
• ON
0 8N
0 2N
• 0.5 N