Question
19. If a golf ball and a baseball are dropped in the absence of air resistance, which ball will hit the ground first?
A) the baseball
B) they will hit at the same time
C) the golf ball
20. If a feather and a baseball are dropped in the presence of air resistance, which ball will hit the ground first?
a
the baseball
b
the feather
c
they will hit at the same time
21. Which of the following are examples of work being done on an object? Choose the 4 that apply.
A) Lifting a rock off the ground
B) Pushing on a car that will not move
C) Carrying a bag of groceries to the car
D) Carrying a box up a flight of stairs
E) Wind blowing against a tree
F) Lifting a bag of groceries
G) Pushing a grocery cart through the store
H) Holding a 25 kg barbell over your head
22. Darla pushed a cart with 50 newtons of force 100 meters away from her house. How much work, measured in joules (J), did she do to move the cart?
a
5000 J
b
150 J
c
50 J
d
2 J
A) the baseball
B) they will hit at the same time
C) the golf ball
20. If a feather and a baseball are dropped in the presence of air resistance, which ball will hit the ground first?
a
the baseball
b
the feather
c
they will hit at the same time
21. Which of the following are examples of work being done on an object? Choose the 4 that apply.
A) Lifting a rock off the ground
B) Pushing on a car that will not move
C) Carrying a bag of groceries to the car
D) Carrying a box up a flight of stairs
E) Wind blowing against a tree
F) Lifting a bag of groceries
G) Pushing a grocery cart through the store
H) Holding a 25 kg barbell over your head
22. Darla pushed a cart with 50 newtons of force 100 meters away from her house. How much work, measured in joules (J), did she do to move the cart?
a
5000 J
b
150 J
c
50 J
d
2 J
Answers
GPT-4o mini
Let's address each question one by one.
**19. If a golf ball and a baseball are dropped in the absence of air resistance, which ball will hit the ground first?**
- **B) they will hit at the same time**
- In a vacuum, all objects fall at the same rate regardless of their mass.
**20. If a feather and a baseball are dropped in the presence of air resistance, which ball will hit the ground first?**
- **a) the baseball**
- In the presence of air resistance, the feather will fall slower due to its larger surface area relative to its mass, while the baseball, being denser and having a smaller surface area compared to its mass, will hit the ground first.
**21. Which of the following are examples of work being done on an object? Choose the 4 that apply.**
- **A) Lifting a rock off the ground**
- **D) Carrying a box up a flight of stairs**
- **F) Lifting a bag of groceries**
- **G) Pushing a grocery cart through the store**
- Work is done when a force moves an object in the direction of the force. Pushing on a car that won't move and holding a barbell do not qualify as work because there's no movement or displacement.
**22. Darla pushed a cart with 50 newtons of force 100 meters away from her house. How much work, measured in joules (J), did she do to move the cart?**
- **a) 5000 J**
- The work done (W) is calculated using the formula W = Force × Distance. Thus, W = 50 N × 100 m = 5000 J.
**19. If a golf ball and a baseball are dropped in the absence of air resistance, which ball will hit the ground first?**
- **B) they will hit at the same time**
- In a vacuum, all objects fall at the same rate regardless of their mass.
**20. If a feather and a baseball are dropped in the presence of air resistance, which ball will hit the ground first?**
- **a) the baseball**
- In the presence of air resistance, the feather will fall slower due to its larger surface area relative to its mass, while the baseball, being denser and having a smaller surface area compared to its mass, will hit the ground first.
**21. Which of the following are examples of work being done on an object? Choose the 4 that apply.**
- **A) Lifting a rock off the ground**
- **D) Carrying a box up a flight of stairs**
- **F) Lifting a bag of groceries**
- **G) Pushing a grocery cart through the store**
- Work is done when a force moves an object in the direction of the force. Pushing on a car that won't move and holding a barbell do not qualify as work because there's no movement or displacement.
**22. Darla pushed a cart with 50 newtons of force 100 meters away from her house. How much work, measured in joules (J), did she do to move the cart?**
- **a) 5000 J**
- The work done (W) is calculated using the formula W = Force × Distance. Thus, W = 50 N × 100 m = 5000 J.