Lesson 6 - The Forces of Nature—Gravity
What would the weight of this object be if it were traveling on the planet Mercury? Mercury has an acceleration of gravity equal to 3.7 m/s2
351.5 N
What is the weight of an object on the Earth's surface that has a mass of 95 kg?
931 N
On Earth, the force of gravity causes all objects to fall with an acceleration of 8.9 m/s².
False. On Earth, the force of gravity causes all objects to fall with an acceleration of 9.8 m/s².
If a ball and feather are released from a height of 10 meters at the same time, and there is no air friction or other forces, the ball would reach the ground before the feather.
False; If a ball and feather are released from a height of 10 meters at the same time, and there is no air friction or other forces, the ball and feather would reach the ground at the same time.
What makes projectile motion possible?
Horizontal motion plus gravity causes the curved shape of projectile motion.
Gravity exists between a pencil and a coffee mug.
True
projectile motion
the motion of an object that curves down toward the ground due to the combination of horizontal forces and the downward force of gravity
The moon is a satellite of Earth.
true
What type of motion is shown in the picture?
projectile
weight
the gravitational force exerted on the mass of an object
Which of these has the greater gravitational pull?
a
gravity
an attractive force between any two objects with mass
satellite
an object that orbits around the Earth
Which of these has the greater gravitational pull?
b
As distance increases, gravitational force ____.
decreases
As mass decreases, gravitational force ____.
decreases
