Newton's Laws of Motion
Luis and Aisha conducted an experiment. They exerted different forces on four objects. Their results are shown in the table. Based on the data, which object has the greatest acceleration?
Object 3
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.
Rahul sits in a chair reading a book. Which force is equal to the force Rahul exerts on Earth?
Rahul's weight
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.
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?
15.0N
A ball has a mass of 140 g. What is the force needed to accelerate the ball at 25 m/s2? (Formula: F=ma)
2.5N
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
What is the mass of a crate if a force of 200 N causes it to accelerate at 8 m/s2? (Formula: F=ma)
25kg
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)
30kg
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.
The Rocket Club is planning to launch a pair of model rockets. To build the rocket, the club needs a rocket body paired with an engine. The table lists the mass of three possible rocket bodies and the force generated by three possible engines. Based on Newton's laws of motion, which combination of rocket bodies and engines will result in the acceleration of 40 m/s2 at the start of the launch?
Body 1 + Engine 2
Laura sees a horse pulling a buggy. She wonders how it can accelerate if the action of the horse pulling the cart would cause an equal and opposite reaction of the cart pulling on the horse. Which explanation best answers her question?
The net forces exerted on the horse and cart are not the same, so they are not balanced forces.
According to Newton's first law of motion, when will an object at rest begin to move?
When an unbalanced force acts upon it
Action and reaction forces are described by which of Newton's laws of motion?
third
