Forces
The unit of force in physics
What is the Newton?
The unit that is used for work and energy in physics.
What is the Joule?
The units for mass in physics?
What is kg?
The unit of power in physics.
What is the Watt?
This term describes the rate of change of an object's position with respect to time.
What is velocity?
The term for something that only has a magnitude
What is a scalar?
The energy of motion is
What is kinetic energy?
1/2 mv2
This states that an object at rest or in motion remains at rest or in motion unless an outside force acts upon it.
What is Newton's 1st Law?
Inertia
Formula for Power?
What is P=W/t?
The formula v_f = v_i + at represents the final velocity of an object when it is accelerating at a constant rate. In this equation, a stands for this quantity.
What is acceleration?
The term for something in physics that has magnitude and direction
What is a vector?
Stored energy that is due to an objects mass and height is...
What is gravitational potential energy?
mgh
This is one form of the equation that represents Newton's Second Law of Motion.
What is F=ma?
Formula for Work done
W=Fd
(dot product of force and displacement)
What is the acceleration due to Gravity on Earth?
9.8m/s2
This is the type of force that opposes gravity when the object is at rest on a surface.
What is the normal force?
Total mechanical energy comes from the sum of what two energies?
Potential and Kinetic
This law states that forces come in pairs.
What is Newton's 3rd Law?
Action/Reaction
A person does 200J of work in 10 seconds. How much power is that?
What is 20W?
At the peak of its trajectory, the vertical velocity of a projectile is equal to this value.
What is zero?
This is the term for the maximum speed reached by a falling object
What is terminal velocity?
The amount of kinetic energy we would expect a ball to have at the bottom of a hill if it started with a gravitational potential energy (GPE) of 300J
What is 300 J?
This term refers to all the combined forces acting on an object
What is net force?
A person mows a 10m stretch of lawn, exerting a force of 4N. How much work did they do?
What is 40 J?
In a velocity-time graph, this quantity is represented by the area under the curve.
What is displacement?
The equation for a centripetal force holding an object in uniform circular motion.
F = m v2/r
The equation for the potential energy of a spring
1/2 k x2
A 30.0-kg girl in a swing is pushed to one side and held at rest by a horizontal force F⃗ so that the swing ropes are 30.0° with respect to the vertical. Calculate the tension in each of the two ropes supporting the swing under these conditions.
170 N
What we call a force when the net work it does on a particle moving between two points does not depend on the path taken by the particle.
A conservative force
For an object in free fall near the surface of the Earth, this kinematic equation relates displacement d, initial velocity vi, acceleration a, and time t.
What is
d = v_i t + \frac{1}{2} a t^2
?