Newtons Laws of Motion
An object in motion stays in motion and an object at rest stays at rest unless acted upon by an outside force.
What is Newtons first law?
What is the law of inertia?
Results from physical contact between forces
What are contact forces?
What is air resistance?
A diagram that shows all the forces acting on it.
What is a force diagram?
0.0015 km = m
What is 1.5 m?
F = m x a
What is Newton's Second Law?
This force is determined by the weight of the object
What is gravitational force?
A man has to walk up the hill with a 30 pound box what is the inertia
answers may vary
Is the tendency of an object to resist changes in its velocity.
What is Inertia?
if a car is on the road what friction is it using?
Rolling Friction
Every action has an equal and opposite reaction
What is Newton's third law?
A force that causes a car to slow down.
What is frictional force?
A girl is suspended motionless from a bar which hangs from the ceiling by two ropes
Answer may vary
Forces that do not involve physical contact
What is a field force?
It NEVER changes, covers equal displacements in equal time periods.
What is horizontal velocity?
An object that weighs 50 kg is accelerating towards the ground at 9.8 m/s2 with what force is it going to hit the ground?
What is 490 N? (50) x (9.8)
Force acting perpendicular to surface of contact
What is Normal force?
A force is applied to the right to drag a sled across loosely-packed snow with rightward acceleration.
Diagram the forces acting upon the sled.
Answers will vary
The effect of a force depends on magnitude and direction
What is a vector?
measured by the amount of something rather than its quality.
What is quantitative data?
If an object experiences an unbalanced force, what will be the result in terms of its motion according to Newton's first law?
Object will continue accelerating indefinitely.
The simplest oscillations occur when the restoring force is directly proportional to displacement. (F=-kx)
What is Spring Force
If an object is on an inclined plane, how would you represent the forces acting on it in a free body diagram?
2) break components along and perpendicular to the incline.
The rule for numbers written in exponential form
What is exponential notation?
A ball rolls 8m in 2 sec. The ball's speed is...
What is 4 m/s?