Question
Object A has a mass of 50kg and object B has a mass of 100 kg. Which object experiences a higher gravitational force?
a
Object A
b
Object B
c
They experience the same gravitational force
16. What is the mass of an object with a weight of 120 Newtons on Earth? The force of gravity on Earth is 9.81 m/s2
Weight = Mass x Gravity
a
1177 kg
b
12 kg
c
130 kg
d
0.082 kg
17. Why does a skydiver need a parachute to land safely?
a
It decreases air resistance and slows the skydiver to a safe speed
b
a parachute isn't needed in order for a skydiver to safely land
c
It increases air resistance and slows the skydiver to a safe speed
a
Object A
b
Object B
c
They experience the same gravitational force
16. What is the mass of an object with a weight of 120 Newtons on Earth? The force of gravity on Earth is 9.81 m/s2
Weight = Mass x Gravity
a
1177 kg
b
12 kg
c
130 kg
d
0.082 kg
17. Why does a skydiver need a parachute to land safely?
a
It decreases air resistance and slows the skydiver to a safe speed
b
a parachute isn't needed in order for a skydiver to safely land
c
It increases air resistance and slows the skydiver to a safe speed
Answers
GPT-4o mini
1. To determine which object experiences a higher gravitational force, we can use the formula for weight (gravitational force):
\[
\text{Weight} = \text{Mass} \times \text{Gravity}
\]
Taking the gravitational acceleration on Earth as \(9.81 \, m/s^2\):
- For Object A (50 kg):
\[
\text{Weight}_A = 50 \, kg \times 9.81 \, m/s^2 = 490.5 \, N
\]
- For Object B (100 kg):
\[
\text{Weight}_B = 100 \, kg \times 9.81 \, m/s^2 = 981 \, N
\]
Since 981 N (Object B) is greater than 490.5 N (Object A), the answer is:
**b. Object B**
---
2. To find the mass of an object with a weight of 120 Newtons on Earth, we can rearrange the weight formula:
\[
\text{Mass} = \frac{\text{Weight}}{\text{Gravity}} = \frac{120 \, N}{9.81 \, m/s^2}
\]
Calculating the mass:
\[
\text{Mass} = \frac{120}{9.81} \approx 12.24 \, kg
\]
The closest answer is:
**b. 12 kg**
---
3. The reason a skydiver needs a parachute to land safely is primarily because a parachute:
**c. It increases air resistance and slows the skydiver to a safe speed.**
While the statement "it decreases air resistance" is incorrect, the parachute's design helps to create drag (air resistance), which slows the descent speed to a safer level for landing.
\[
\text{Weight} = \text{Mass} \times \text{Gravity}
\]
Taking the gravitational acceleration on Earth as \(9.81 \, m/s^2\):
- For Object A (50 kg):
\[
\text{Weight}_A = 50 \, kg \times 9.81 \, m/s^2 = 490.5 \, N
\]
- For Object B (100 kg):
\[
\text{Weight}_B = 100 \, kg \times 9.81 \, m/s^2 = 981 \, N
\]
Since 981 N (Object B) is greater than 490.5 N (Object A), the answer is:
**b. Object B**
---
2. To find the mass of an object with a weight of 120 Newtons on Earth, we can rearrange the weight formula:
\[
\text{Mass} = \frac{\text{Weight}}{\text{Gravity}} = \frac{120 \, N}{9.81 \, m/s^2}
\]
Calculating the mass:
\[
\text{Mass} = \frac{120}{9.81} \approx 12.24 \, kg
\]
The closest answer is:
**b. 12 kg**
---
3. The reason a skydiver needs a parachute to land safely is primarily because a parachute:
**c. It increases air resistance and slows the skydiver to a safe speed.**
While the statement "it decreases air resistance" is incorrect, the parachute's design helps to create drag (air resistance), which slows the descent speed to a safer level for landing.