Question 15

Question

Question 15
Which of Newton's Laws does the following scenario describe?

My car hits a mosquito, and the mosquito hits back, equally.

a
1st Law
 b
2nd Law
 c
3rd Law
Question 16
Two students are pushing a cart, as shown below.

What is the net force acting on the cart?

a
50 N to the right
 b
150 N to the right
 c
200 N to the left
 d
350 N to the right
 e
350 N to the left
 f
50 N to the left
 g
200 N to the right
 h
150 N to the left
Question 17
An object that is accelerating may be (choose all that apply)

a
slowing down.
 b
changing direction.
 c
not moving.
 d
gaining speed.
 e
traveling at a constant speed
Question 18
What is the difference between a vector and a scalar?

a
A vector measurement contains a direction and magnitude, a scalar measurement only contains a magnitude
 b
A vector is only used in measuring forces, a scalar is only used in measuring mass
 c
A vector measurement is required for distance, a scalar measurement is required for displacement
 d
A vector is only measured in SI units, where scalars are only measured in US Customary units
Question 19
If a dolphin swims at 1.85 m/s, how far will the dolphin have traveled after 6.0 s?

a
31 m
 b
11 m
 c
9.0 m
 d
3.2 m
Question 20
What is the gravitational force of attraction between a planet and a 17-kilogram mass that is freely falling toward the surface of the planet at 8.8 m/s2?

a
150 N
 b
8.8 N
 c
1.9 N
 d
0.52 N

GPT-4o mini · Answer

Here's the breakdown of each question you've presented:

Question 15: The scenario describes Newton's 3rd Law of Motion, which states that for every action, there is an equal and opposite reaction. So the correct answer is: c 3rd Law

Question 16: To determine the net force acting on the cart, we need to know the forces acting on it. However, based on the options given, without additional context, I cannot determine the correct answer. If we assume a scenario with a force of 200 N to the right and another force of 150 N to the left, then the net force would be: 200 N (right) - 150 N (left) = 50 N to the right. So the answer could potentially be: a 50 N to the right (this might vary based on additional context).

Question 17: An object that is accelerating may be:

a slowing down.
b changing direction.
c not moving.
d gaining speed.

Thus, the correct answers are: a, b, and d.

Question 18: The difference between a vector and a scalar is:

a A vector measurement contains a direction and magnitude, a scalar measurement only contains a magnitude.

So the correct answer is: a A vector measurement contains a direction and magnitude, a scalar measurement only contains a magnitude.

Question 19: To find the distance traveled by the dolphin, we can use the formula: distance = speed × time. Distance = 1.85 m/s × 6.0 s = 11.1 m (rounded is approximately 11 m).

So the closest answer is: b 11 m.

Question 20: To find the gravitational force of attraction, we use Newton's second law of motion, F = m × a. F = 17 kg × 8.8 m/s² = 149.6 N, which rounds to approximately 150 N.

So the correct answer is: a 150 N.

I hope this helps clarify the questions! Let me know if you need additional information.