2. Which statement correctly classifies distance and displacement?(1 point)
Responses
Both distance and displacement are scalar quantities.
Both distance and displacement are scalar quantities.
Distance is a scalar quantity, and displacement is a vector quantity.
Distance is a scalar quantity, and displacement is a vector quantity.
Distance is a vector quantity, and displacement is a scalar quantity.
Distance is a vector quantity, and displacement is a scalar quantity.
Both distance and displacement are vector quantities.
Distance is a scalar quantity, and displacement is a vector quantity.
3. On a position vs. time graph, which feature would represent motion in the negative direction over time?(1 point)
Responses
an upward-sloping line segment
an upward-sloping line segment
a horizontal line segment
a horizontal line segment
a vertical line segment
a vertical line segment
a downward-sloping line segment
a downward-sloping line segment
4. Two construction workers are attempting to pull a slab of concrete off of the ground. Each of the workers are pulling up with a force of 225 N, while the slab of concrete applies a gravitational force of 400 N in the opposite direction, remaining stationary. If the pulling forces applied to the slab of concrete are assigned a positive value, what is the net force of the scenario, and in which direction will the slab of concrete move?(1 point)
Responses
-50 N; the slab will remain stationary
-50 N; the slab will remain stationary
175 N; the slab will move upward
175 N; the slab will move upward
50 N; the slab will move upward
50 N; the slab will move upward
-175 N; the slab will remain stationary
-175 N; the slab will remain stationary
5. A stone with a mass of 10 kg sits on the ground. Gravity acts on the stone at a rate of 9.8 m/s2. What is the normal force acting on the stone, keeping it at rest?(1 point)
Responses
1.02 N
1.02 N
10 N
10 N
9.8 N
9.8 N
98 N
98 N
6. A dog weighing 18 kg runs into a park at a velocity of .63 m/s. What is the momentum of the dog?(1 point)
Responses
0.35 kg x m/s
0.35 kg x m/s
28.5 kg x m/s
28.5 kg x m/s
11.34 kg x m/s
11.34 kg x m/s
17.37 kg x m/s
The momentum of the dog can be calculated using the formula:
momentum = mass * velocity
Given:
mass (m) = 18 kg
velocity (v) = 0.63 m/s
Thus, the momentum of the dog is:
momentum = 18 kg * 0.63 m/s = 11.34 kg x m/s
Therefore, the correct answer is 11.34 kg x m/s.
7. A spring scale shows a net force of 0.8 N acting on a 1.5-kg mass. What happens to the acceleration of the object if the net force is decreased to 0.2 N?(1 point)
Responses
The acceleration increases to four times its original value, or about 2.13 m/s2.
The acceleration increases to four times its original value, or about 2.13 m/s2.
The acceleration decreases to a quarter of its original value, or about 0.13 m/s2.
The acceleration decreases to a quarter of its original value, or about 0.13 m/s2.
The acceleration increases to four times its original value, or about 0.13 m/s2.
The acceleration increases to four times its original value, or about 0.13 m/s2.
The acceleration decreases to a quarter of its original value, or about 2.13 m/s2.