Name That Law!
A hockey puck slides across the ice and eventually slows down because of friction. Which law explains why the puck would keep moving if no unbalanced force acted on it?
What is Newton's First Law
My dog and I are driving to the dog groomer. I am driving down the highway going 55 mph when suddenly, I have to apply the brakes to avoid a squirrel. When the brakes are applied, What will most likely happen to our bodiesdue to inertia?
What is they will continue moving forward for a short time
According to Newton's Second Law, how is the force due to gravity acting on an object calculated?
What is Mass is multiplied by acceleration
If I kick a soccer ball in such a way that it pushes the air to the right, what does Newton's third law predict will happen to tohe motion of the soccer ball as a reult?
What is the ball will curve to the right
A kickball player kicks the kickball that has a mass of 1 kg causing the ball to accelerate at a rate of 15m/s2
What is the net force applied to the ball?
What is 15N
A gymnast lands on a trampoline, and the trampoline pushes upward against the gymnast. Which law explains the interaction between the gymnast and the trampoline?
What is Newton's Third Law
I am trying to push a wooden box to the left across a carpet. The box will not budge because the applied force is balanced by friction. Which force is stronger, my applied force or the friction?
What is the forces are equal. Friction will push to the right.
I launch two objects with different masses from a catapult. Object A has a greater mass than object B. If I use the same force to launch both objects, which object will accelerate faster?
What is object B
Explain the force exerted on the hammer and nail as a hammer strikes a nail.
What is the hammer and nail exert an equal force in opposite directions
A baseball with a mass of 0.3 is thrown straight up and begins falling back down toward the ground. The force of gravity is 10 newtons downward. The force of air resistance acting on the ball is 4 Newtons upward. What is the Balls Acceleration?
What is 0.2 m/s2
A canoe moves forward when a paddler pushes water backward with a paddle.
Newton's third Law
A student places a textbook on a desk. The book remains in the same position all day. Which property explains why the book does not move on its own?
An object at rest remains at rest
A magician quickly pulls a tablecloth out from under dishes, and the dishes remain nearly in place. Explains why the dishes resist moving with the cloth
The dishes have inertia and tend to remain at rest
Question: A fish swims forward by moving its tail. What is the action force, and what is the reaction force?
What is The fish pushes water backward, and the water pushes the fish forward.
Michelle is pulling a 200 kg wagon, accelerating at 1.25 meters per second squared. Lisa joins her in pulling the wagon in the same direction and the wagon's acceleration increases to 2.25 m/s2. How much force is Lisa contributing to pull the wagon?
What is 200 Newtons
F=ma
F=(200)(2.25-1.25)
A=200(1)
A=200
A skateboarder rolls down a sidewalk and suddenly hits a small rock. The skateboard stops, but the rider flies forward. Which law explains this?
Newton's First Law
A car travels at a constant speed in a straight line. What can you conclude about the net force acting on the car?
Forces acting on the car are balanced
Two identical shopping carts are moving at the same velocity. One cart encounters a strong opposing force while the other continues on a smooth, unobstructed surface. Which cart changes its motion, and why?
What is The cart experiencing the opposing force changes its motion because an unbalanced force acts on it. The other cart continues at a constant velocity if no net force acts on it.
Two bumper cars collide at an amusement park. Car A pushes on Car B, and Car B pushes on Car A with an equal force in the opposite direction. Which law is demonstrated? Why might the cars have different accelerations?
What is Newton’s Third Law. The cars exert equal and opposite forces on each other. Their accelerations may differ because their masses or other net forces differ.
An Army Ranger is jumping out of an airplane. Before his parachute opens, the downward force of gravity on his body is 400 N and the upward force of air resistance is 100 N. After the parachute opens, the downward force is still 400 but the upward force is now 300. How does the net force on the Ranger change when the parachute is opend?
Whast is it decreases from 300 N to 100 N, and the direction stays the same (downward)
A basketball player jumps by pushing down on the gym floor. The floor pushes the player upward. Which law explains this?
Newton's Third Law
An amusement park worker pushes an empty ride cart and a loaded ride cart with the same net force. Which cart accelerates more?
What is The empty cart because it has less mass.
A football player pushes a 50 kg blocking sled with a net force of 150 N. Another player pushes a 100 kg sled with the same net force. Calculate the acceleration of each sled and explain why they differ.
First sled: a = 150 \50 = 3
Second sled: a = 150 \ 100 = 1.5
A football player tackles another player. Both players exert forces on each other during the collision, but one player falls while the other stays standing. Does this violate Newton’s Third Law? Explain.
What is No. The players exert equal and opposite forces on each other, but their accelerations and resulting movements can differ because of differences in mass, balance, body position, and other forces.
If I am driving at a constant speed around a circular race track, describe how my velocity will change complared to my speed.
What is velocity will constantly change as your direction is constantly changing.