Force
What is a force?
What is a push or a pull?
What do we call the invisible force exerted by magnets?
What is magnetic force?
What is the weight of a 50kg person on Earth?
Fg=mg Earth's gravity= 9.8m/s2
What is 50 x 9.8= 490 Newtons
For every action there is an equal and opposite reaction.
What is Newton's 3rd Law of Motion?
What term describes the tendency of an object to resist change in motion?
What is "inertia?"
Force is measured in...
What is Newtons?
A person pulls on a wire that is anchored to a wall. What force pulls back on the person towards the wall?
What is tension?
A car travels 25 meters in 5 seconds. What is the car's velocity?
V=d/t
What is V= 25 meters/5seconds= 5 m/s
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
What is Newton's 1st Law of Motion?
What term describes the quantity of motion an object has?
What is momentum?
What type of force opposes motion, causing objects to slow down or stop?
What is friction?
What happens to the motion of an object if the forces acting on the object are equal and balanced?
What is "the motion of the object does not change."
A car is stopped at a traffic light. The light turns green. It increases its velocity to 50 m/s in 5 seconds. What is the car's acceleration?
A=change in velocity/t
What is A= 50 m/s divided by 5 seconds= 10 m/s 2
An object accelerates when a force acts on an object with mass.
What is Newton's 2nd Law of Motion?
Drag or "air resistance" is a friction-like force exerted by...
The force of friction exerted by a surface depends on...
What is the smoothness of the surface?
What causes an object to move?
What is "when unbalanced forces act on an object?"
An object with a mass of 25 kg accelerates 12 m/s squared. What is the force exerted by the object?
F=ma
What is 25 x 12= 300 Newtons
Which of Newton's Laws is most important to describing what happens to objects during a collision?
What is Newton's 3rd Law of Motion?
Jupiter is a much more massive planet that Earth. What would happen to a person's mass and weight if he or she were on Jupiter?
What is "the mass would stay the same, but the weight would increase?
Which force is responsible for causing leaves from a tree to fall to the Earth's surface?
What is gravitational force?
What pattern of motion best describes Earth's circular path around the sun?
What is revolution?
An object traveling 50 m/s comes to a stop in 4 seconds. What is its acceleration?
Acceleration = (vfinal – vinitial) ÷ time
Acceleration = (0 m/s − 50 m/s) ÷ 4 s = −50 m/s ÷ 4 s
Acceleration = −12.5 m/s2
What is the Law of Inertia?
What is another name for Newton's 1st Law of Motion? An object at rest will remain at rest unless acted on by unbalanced forces. An object in motion continues in motion with the same speed and direction unless acted on by unbalanced forces.
What would happen to a boat in water if buoyancy were less that the weight of the boat?
What is the boat would sink because the buoyant force must be greater than or equal to the weight of the boat in order for the boat to stay afloat?