Newton's Laws of motions
According to Newton's second law of motion, what is force equal to?
mass times acceleration
Two people push on the same door from opposite sides as shown. They will only see the door move when
one person exerts more force than the other so that the forces are unbalanced.
What is the mass of a crate if a force of 200 N causes it to accelerate at 8 m/s2? (Formula: F=ma)
25 kg
A ball has a mass of 140 g. What is the force needed to accelerate the ball at 25 m/s2? (Formula: F=ma)
3.5 N
When discussing Newton's laws of motion, which terms do people most likely use when talking about Newton's third law of motion?
"action" and "reaction"
An object has a mass of 5 kg. What force is needed to accelerate it at 6 m/s2? (Formula: F=ma)
30 N
A cart accelerates at 2 m/s2 when a force of 60 N is applied. What is the mass of the cart? (Formula: F=ma)
30 kg
A force of 5 N accelerates an object. The object's mass is 50 g. What is the acceleration of the object? (Formula: F=ma)
100 m/s2
A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15.0 N. What is the force that the pin exerts on the bowling ball?
15.0 N
Ana exerts a force of 20 N on a volleyball that has a mass of 0.15 kg. What is the force that the volleyball exerts on Ana?
20n
Newton's first law of motion was a giant leap forward in scientific thought during Newton's time. Even today, the idea is sometimes difficult at first for people to understand. Which statement is the best example of an object and motion that would make it hard for people to believe Newton's first law?
A rolling ball eventually slows down and comes to a stop.
Juan inflates a balloon and then releases its end to let the balloon go free as air comes out. The balloon then flies around the room. Which statement describes how this example is an application of Newton's laws of motion?
According to Newton's third law of motion, the balloon is pushed forward as the air is forced out.
A skydiver falls toward the ground at a constant velocity. Which statement best applies Newton's laws of motion to explain the skydiver's motion?
An upward force balances the downward force of gravity on the skydiver.
How do Newton's laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can pass a puck as quickly as possible?
Smooth ice reduces the unbalanced forces that would slow the hockey puck.
Action and reaction forces are described by Newton's ____law of motion.
third
According to Newton's first law of motion, when will an object at rest begin to move?
when an unbalanced force acts upon it
