Newton's Second Law Quick Check
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Question
Blake and Drew are playing horseshoes. Blake takes the first turn, and his horseshoe lands three-fourths of the way to the target. Drew takes the next turn, and his horseshoe lands past the target. Which statement best explains the results?(1 point)
Responses
Drew used a horseshoe with more mass and threw with less force than Blake.
Drew used a horseshoe with more mass and threw with less force than Blake.
Drew used a horseshoe with more mass and threw with the same force as Blake.
Drew used a horseshoe with more mass and threw with the same force as Blake.
The horseshoes have the same mass, but Drew threw with less force than Blake.
The horseshoes have the same mass, but Drew threw with less force than Blake.
The horseshoes have the same mass, but Drew threw with more force than Blake.
The horseshoes have the same mass, but Drew threw with more force than Blake.
The correct answer is: The horseshoes have the same mass, but Drew threw with more force than Blake.
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?(1 point)
Responses
0.6 N
0.6 N
11.6 N
11.6 N
65 N
65 N
1.8 N
Four movers pick up boxes. Each box has a different mass, and each mover applies a different amount of force to lift the box. Which box will have the greatest acceleration?(1 point)
Responses
a 20 kg box lifted with 60 N of force
a 20 kg box lifted with 60 N of force
a 10 kg box lifted with 40 N of force
a 10 kg box lifted with 40 N of force
a 10 kg box lifted with 60 N of force
a 10 kg box lifted with 60 N of force
a 20 kg box lifted with 40 N of force
To determine the force applied to the baseball, we can use Newton's second law equation:
Force (F) = mass (m) x acceleration (a)
Given:
Mass (m) = 145 g = 0.145 kg
Acceleration (a) = 80 m/s^2
Plugging in these values, we can calculate the force:
F = 0.145 kg x 80 m/s^2
F = 11.6 N
Therefore, the correct answer is: 11.6 N.
Which situation describes a negative acceleration?(1 point)
Responses
a swimmer moving at a constant velocity
a swimmer moving at a constant velocity
a diver jumping off a diving board and falling to the swimming pool below
a diver jumping off a diving board and falling to the swimming pool below
a bicycle increasing its velocity as the rider pedals harder
a bicycle increasing its velocity as the rider pedals harder
a runner slowing down at the end of a race