8.3 Guided ReadingName:
“Newton’s Laws of Motion”
1) Isaac Newton described the relationship between and in laws of motion known as Newton’s laws of motion.
2) A book will slide much further on a surface than a rough one. This is because there is less force on the smooth surface. Without friction the book will keep sliding .
3) Newton’s first law states that an object at will stay at rest and an object in motion maintains its unless it experiences an .
4) An example of this law occurs when your body stops moving forward during breaking because of the force of the and the friction between your and the car seat.
5) Any change in motion must overcome or the tendency of an object to remain at rest or in motion with a constant velocity. An object with very little mass can be with a small force, while it takes a much force to accelerate an object with a large mass.
6) Newton’s second law describes the effect of forces.
7) This second law says the unbalanced force acting on an object the objects mass times its .
8) When two masses are the same a greater provides a greater .
9) The SI unit of force is the .
10) When gravity is the only force acting on an object it is said to be in . Free fall acceleration results from and near the earth’s surface is approximately .
11) In the absence of all objects near Earth’s surface accelerate at the same rate regardless of .
12) A heavier object experiences greater force than a lighter object, but a heaver object is harder to because it has more mass.
13) is the force on an object due to gravity. It equals mass times free fall .
14) Mass and weight are to each other but they are not the same. Mass measures how much is in an object. Weight is the on object experiences because of its mass.
15) is the same anywhere but changes in each place depending on the gravitational forces of the place.
16) On land large animals must have strong to support their mass against the forces of .
17) The velocity is reached when two forces are equal. The object will stop and reach its velocity.
18) Sky divers can reach a terminal velocity of before they deploy their parachute. After releasing the parachute air resistance increases and slows them down.
19) When kicking a soccer ball the force exerted on the ball is an force, and the force exerted on your foot by the ball is the force.
20) Newton’s third law states that for every there is an equal and reaction force.
21) Rockets burn most of their fuel during the stages of flight because the rocket has more to accelerate. As the fuel is used the rockets decreases and the force needed to produce a given decreases.