Gravity and Motion

Zayden and Arya are discussing why they don't float away when they jump. What is the definition of the force that keeps them on the ground, called gravity?

• Gravity is a force that attracts objects towards each other.

• Gravity is a force that has no effect on objects.

• Gravity is a force that only affects living organisms.

• Gravity is a force that repels objects away from each other.

Name three factors that affect gravitational pull.

• Mass, distance, gravitational constant

• Color, texture, shape

• Temperature, humidity, wind speed

• Density, velocity, atmospheric pressure

What is the acceleration due to gravity on Earth?

• 12 m/s^2

• 9.8 m/s^2

• 5 m/s^2

• 20 m/s^2

How does the speed of an object affect its gravitational pull?

• The slower an object moves, the stronger its gravitational pull.

• The faster an object moves, the stronger its gravitational pull.

• The speed of an object affects its gravitational pull in unpredictable ways.

• The speed of an object does not affect its gravitational pull.

What is the relationship between distance and gravitational pull?

• Directly proportional

• Unrelated

• Exponentially proportional

• Inversely proportional

Zayden and Arya are playing with a ball. Zayden says that when he throws the ball up, it comes back down because of gravity, a force that pulls objects towards each other. Arya disagrees. Is Zayden's statement true or false?

• False

• True

• Gravity is a force that pushes objects away from each other.

• Gravity is not a force.

Emma is conducting a physics experiment. She measures the final velocity and initial velocity of a moving object and also records the time taken for this change. What formula should she use to calculate the acceleration of the object?

• Acceleration = (final velocity - initial velocity) / time

• Acceleration = (final velocity - initial velocity) * time

• Acceleration = (final velocity * initial velocity) / time

• Acceleration = (final velocity + initial velocity) / time

Zayden and Arya are discussing the gravitational pull of Earth and the Moon. They are curious about how the mass of these celestial bodies affects their gravitational pull. How does the mass of an object, like Earth or the Moon, affect its gravitational pull?

• The gravitational pull of an object like Earth or the Moon is inversely proportional to its mass.

• The gravitational pull of an object like Earth or the Moon increases as its mass decreases.

• The mass of an object like Earth or the Moon directly affects its gravitational pull.

• The mass of an object like Earth or the Moon has no effect on its gravitational pull.

Arya, Zayden, and Kai are participating in a race at their school's sports day. What is the difference between their speed and velocity during the race?

• Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that refers to the rate at which an object changes its position.

• Speed is a measure of distance traveled, while velocity is a measure of time taken.

• Speed and velocity are the same thing.

• Speed is a vector quantity that refers to how fast an object is moving, while velocity is a scalar quantity that refers to the rate at which an object changes its position.

Draw a speed-distance graph for an object moving at a constant speed.

• No line (just dots)

• Curved line

• Straight line with a negative slope

• Straight line with a positive slope