Newton's Laws of Motion
Is 45 lbs. a scalar or a vector quantity?
Vector! Weight is a vector quantity because gravity is taken into account (pulling downwards)
What is the force that always acts in a downward direction? Hint: this value changes depending on the planet and on Earth is equal to 9.8 m/s/s.
Gravitational Force
Is momentum a scalar or vector quantity? Why?
Momentum is a vector quantity because we need to include a direction with momentum. Ie: 42 kg*m/s North
A hockey puck slides on ice with very little friction. If no forces act on it, what will happen to its motion?
It will continue moving at a constant velocity.
What is the name of the famous cat on the internet known for it's very grumpy expressions?
Grumpy Cat (real name is Tardar Sauce)
Is 92 degrees a scalar or vector quantity?
Scalar! We do not take direction into account when measuring temperature.
What is the force called that is exerted on objects by a rope or string?
Tension force.
What is potential energy?
Stored energy.
Two cars collide head-on and stick together. What type of collision is this called, and what principle explains the outcome?
Perfectly inelastic collision; conservation of momentum.
How many toes do cats have on their front paws?
Five. Unless they have polydactyly, then 6!
For every action there is an equal and opposite reaction. Which of Newton's Laws does this describe?
Newton's Third Law.
Name two different surfaces: One with high friction and one with low friction.
Answers may vary. An example of high friction could be dirt or concrete. Low friction could be ice or plastic sheets
What is the equation for calculating momentum? What does each variable in the equation stand for?
P=m*v. P-momentum, m-mass, v-velocity
A person jumps off a small boat onto a dock. What happens to the boat, and which law explains this?
The boat moves backward; Newton’s Third Law (action-reaction).
What is the function of whiskers on a cat?
To judge distance, sense objects, and help with balance. Used for navigation.
Describe the difference between speed and velocity.
Speed is the distance/time of an object. Velocity is the displacement/time. Velocity takes into account the direction of movement!
What are the four fundamental forces?
Strong force, electromagnetic force, weak force, gravitational force
In a collision, kinetic energy can be transferred to different types of energy. Name at least one type of energy that kinetic energy may be transferred to in a collision.
Answers may vary: Heat, light, or sound.
Skibidi the scientific squirrel wanted to see what would hit the ground first: himself, who weighs 1.5 pounds, or his favorite acorn which weighs 5 grams. He created a pile of leaves at the bottom of a tree for cushion, climbed high in the tree, and jumped at the same time as releasing his acorn from the same height. Which hit the ground first and why?
They hit the ground at the same time but with different forces. They fall at the same rate due to Newton's Second Law. (Remember Galileo's falling objects??)
What is the cat breed that lacks fur?
Sphynx
Which of Newton's Laws explains why you feel pushed back into your seat when a car suddenly accelerates?
Newton's First Law (Law of Inertia)
If a 10 N force pushes a 2 kg object to the right and a 4 N force pushes it to the left, what is the net force and in which direction will the object move?
Net force is 6 N to the right; the object will accelerate to the right.
In this type of collision, there is a loss of total kinetic energy.
Inelastic Collision
Mrs. Reith is grocery shopping. Her heavy shopping cart is full of ice cream (FULL), and it is hard to push the cart. Describe all of the forces acting on the shopping cart.
Applied force, normal force, gravitational force, friction force.
What is the term for a group of cats?
A clowder