Questions and Answers
Friction is a force that assists motion between objects that are touching.
False
An eagle can weigh up to 29 kg and can carry large prey while flying.
True
The kestrel can carry prey heavier than 1 kg due to the effects of gravity.
False
A large rock is lighter than a pillow.
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It takes a small unbalanced force to move a rocket away from Earth.
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Study Notes
Forces Acting on Objects
- Friction is a force that opposes the motion between two touching objects, acting in the opposite direction of motion.
- Gravity is a force that attracts objects toward the center of the Earth, responsible for why objects fall.
Eagle and Kestrel Characteristics
- An eagle can weigh up to 29 kg (63 lb) and has the capability to carry large prey while flying.
- A kestrel, in contrast, weighs less than 1 kg (2 lb) and cannot carry more than its own weight due to the pull of gravity.
Weight and Gravity
- An object's weight is determined by the strength of gravity acting on it; it varies based on mass and gravitational force.
- A large rock is significantly heavier than a pillow, illustrating that gravity exerts greater force on larger mass objects.
Rockets and Forces
- Rockets are extremely heavy and require a significant unbalanced force to overcome gravitational pull in order to ascend from the Earth's surface.
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Description
This quiz explores the fundamental forces acting on objects, including friction and gravity. It also covers the characteristics of birds of prey, and how weight is influenced by gravitational force. Additionally, the quiz touches on the challenges rockets face when overcoming gravity to launch into space.
