Forces
The metric unit for Force
What is the Newton?
Newton's First Law states this.
What is an object at rest stays at rest and an object in motion stays in motion until acted upon by an outside force?
Newton's Second Law States this
What is the acceleration of an object depends on both the force and the mass of the object?
Newton's Third Law states this.
What is every action has an equal and opposite reaction?
A car is driving down the road, traveling at a constant speed. What is its net force?
What is 0 Newtons?
The force of gravity.
What is weight?
The type of force must be present for the motion of an object to change
What is an unbalanced force?
According to Newton's Second Law, acceleration is a result of this.
What is unbalanced forces?
The two types of forces in the context of Newton's Third Law
What are action forces and reaction forces?
A free body diagram has 550 N of force acting to the right, 750 N of force acting to the right, 250 N of force acting to the right, and 1563 N of force acting to the left. What is the net force on this free body diagram?
What is 13 N to the left?
The force that resists the motion of objects.
What is friction?
The other name for Newton's First Law
What is the law of inertia?
The net force when the acceleration is zero (moving at a constant speed).
What is zero?
An example of an action/reaction pair.
Many correct answers, but examples include your hand exerts a force on the ball and the ball exerts an equal an opposite force on your hand.
A 0.15 kg baseball and a 7.25 kg bowling ball are both rolling at 3 m/s. Which object is easier to stop and why (in terms of inertia)?
The baseball because it has less inertia.
The sum of all forces on an object
What is the net force?
The property of an object that resists changes in motion
What is inertia?
The relationship between force and acceleration
What is directly proportional? (as one increases, the other increases OR as one decreases, the other decreases)
The action and reaction forces [cancel each other out/do not cancel each other out]
What is action and reaction forces do not cancel each other out
List all of the action/reaction pairs involved in dribbling a basketball.
What is
-your hand exerts a force on the basketball and the basketball exerts an equal and opposite force on your hand
-the basketball exerts a force on the floor and the floor exerts an equal and opposite force on the basketball
-you exert a force on the floor and the floor exerts and equal and opposite force on you
An object at rest OR moving at a constant speed is said to be in this state.
What is equilibrium?
The relationship between mass and inertia
What is as mass increases, inertia increases?
The relationship between acceleration and mass.
What is inversely proportional? (as one increases, the other decreases AND as one decreases, the other increases)
Draw a diagram illustrating Newton's Third Law
Many correct answers.
You hit a 0.15 kg baseball with a force of 17,500 Newtons. What is it's acceleration in m/s2?
What is 116,667 m/s2?
1 meter = 3.28 feet
1 mile = 5,280