1st law
What is first newton law?
An object at rest stays at rest, an object in motion stays in motion.
what is the formula for the 2nd law?
What do they stand for?
F=M x A
force= mass x Acceleration
For every action,there is an equal and opposite?
reaction
You are sitting in a car, at rest, when another car rear ends your vehicle. Why do you and the passengers experience a whiplash, in terms of Newton's laws of motion?
An object at rest tends to stay at rest.
Suppose that a sled is accelerating at a rate of 2 m/s2. If the net force is tripled and the mass is halved, then what is the new acceleration of the sled?
12 m/s2
A science book with a mass of 2.8 kg is pushed along a table with a net force of 1 N. What is the book's acceleration?
0.36 m/s^2
what are 4 type of friction?
sliding
rolling
Air
water
What causes an object to accelerate?
Unbalanced forces acting on an object cause the object to accelerate.
Who came up with the 3rd Law of Motion?
Isaac Newton
A box is sliding down a plane that has a inclination angle of θ=10∘. Calculate the coefficient of kinetic friction μk if the box is moving at a constant velocity v.
0.176
What factors determine the air resistance force on an object?
The air resistance force an object experiences depends on the object's speed and area.
F=MA
An object of mass 10 kg is accelerated upward at 2 m/s2. What force is required?
20 N
A passenger in an elevator has a mass that exerts a force of 100N downwards. He experiences a normal force upwards from the elevator's floor of 120N. What direction is he accelerating in, if at all, and at what rate?
2 m/s2 upwards
Why do all freely falling objects fall with the same acceleration?
All freely falling objects fall with the same acceleration because the net force on an object is only its weight, and the ratio of weight to mass is the same for all objects.
If a baseball and a cannonball are dropped from the same height at the same time in a vacuum, which ball will hit the ground first?
The balls land at the same time.