1. Define:
a. Gravitational Force:
b. Weight:
c. Mass:
d. Gravitational Attraction:
2. How are mass and weight different?
3. Would the force of gravity be the same or different on a compact car and a large tractor trailer?
4. Would a person’s weight be the same or different on Mars as it is on Earth? What about his/her mass?
5. Which object would feel heavier on Earth: a single apple or a bag of apples?
6. Why is gravitational attraction less on the moon than it is on Earth?
Investigating Gravity:
1. Define:
a. Acceleration:
b. Gravity:
2. You drop balls of varying mass, foam ball, soccer ball and a bowling ball, from the same height on Earth.
a. Will they reach the Earth at the same time?
b. What does this tell us about the force of gravity on objects with different masses?
c. The acceleration due to gravity is the (same/different) for objects with different masses. (Highlight the correct answer)
Analyzing Gravitational Data:
1. Define:
a. Air Resistance:
2. Air resistance acts opposite of what force?
3. If you drop a feather and a bowling ball from the same height, would they reach the ground at the same time (assuming there is no air resistance)?
4. Why do a feather and a bowling ball not hit the ground at the same time when dropped from the same height?
Gravity and Air Resistance:
1. Define:
a. Terminal velocity:
2. What term means that the force of air resistance equals the force of gravity?
3. skydiver is falling to Earth and opens his parachute. Explain how the force of air resistance changes from the moment the parachute opens.
1. a. Gravitational Force: The force of attraction between two objects due to their masses.
b. Weight: The force with which a mass is pulled downwards by gravity.
c. Mass: The amount of matter in an object, measured in kilograms.
d. Gravitational Attraction: The force between two objects that is due to their masses and causes them to be drawn towards each other.
2. Mass is a measure of the amount of matter in an object and remains the same regardless of location, whereas weight is the force experienced by an object due to gravity and varies depending on the strength of gravity.
3. The force of gravity would be the same on both the compact car and the large tractor trailer because weight depends on the mass and the acceleration due to gravity, which is the same for both objects.
4. A person's weight would be different on Mars compared to Earth because the force of gravity is weaker on Mars. However, their mass would remain the same regardless of location.
5. The bag of apples would feel heavier on Earth because it has more mass compared to a single apple. Weight is directly related to the object's mass, so an object with more mass will feel heavier.
6. Gravitational attraction is less on the moon than on Earth because the moon has a smaller mass compared to Earth. Gravity is directly proportional to the mass of the objects involved, so a smaller mass results in a weaker gravitational attraction.
Investigating Gravity:
1. a. Acceleration: The rate at which an object's velocity changes over time.
b. Gravity: The force that attracts objects towards each other due to their mass.
2. a. Yes, they will reach the Earth at the same time.
b. This tells us that the force of gravity acts equally on objects with different masses.
c. The acceleration due to gravity is the same for objects with different masses.
Analyzing Gravitational Data:
1. a. Air Resistance: The force exerted by air on objects moving through it.
2. Air resistance acts opposite to the force of gravity.
3. Assuming there is no air resistance, the feather and bowling ball would reach the ground at the same time because the force of gravity acts equally on both objects regardless of their mass.
4. A feather and a bowling ball do not hit the ground at the same time when dropped from the same height because the feather experiences a greater force of air resistance, slowing it down compared to the bowling ball.
Gravity and Air Resistance:
1. a. Terminal velocity: The constant velocity that a falling object reaches when the force of air resistance equals the force of gravity.
2. Terminal velocity means that the force of air resistance equals the force of gravity.
3. When the parachute opens, the force of air resistance increases, causing the skydiver's acceleration to decrease. This slows down the skydiver's descent, reducing their speed.