P5- Forces Flashcards
What is work done?
Work done is the transfer of energy from one form to another by a force acting over a distance.
What is the unit of work done?
The unit of work done is joules (J).
True or False: Work done is a scalar quantity.
True
Define elasticity.
Elasticity is the ability of a material to return to its original shape after a deforming force is removed.
What is Hooke’s Law?
Hooke’s Law states that the extension of a spring is directly proportional to the force applied, as long as the elastic limit is not exceeded.
What is the formula for calculating spring constant (k)?
k = F / x, where k is the spring constant, F is the force applied, and x is the extension.
What is acceleration?
Acceleration is the rate of change of velocity.
What is the unit of acceleration?
The unit of acceleration is meters per second squared (m/s^2).
True or False: Acceleration can be positive or negative.
True
What is the formula for acceleration?
a = (v_f - v_i) / t, where a is acceleration, v_f is final velocity, v_i is initial velocity, and t is time.
What is the relationship between force, mass, and acceleration?
Force = mass x acceleration (F = ma).
What is the work-energy principle?
the work done on an object is equal to the change in its kinetic energy.
What is potential energy?
Potential energy is the energy an object has due to its position or state.
What is kinetic energy?
Kinetic energy is the energy an object possesses due to its motion.
What is the formula for calculating kinetic energy?
KE = 0.5 x m x v^2, where KE is kinetic energy, m is mass, and v is velocity.
What is the conservation of energy principle?
The conservation of energy principle states that energy cannot be created or destroyed, only transferred or transformed.
What is the formula for calculating work done?
W = F x d x cos(theta), where W is work done, F is force, d is distance, and theta is the angle between force and displacement.
What is the formula for calculating power?
P = W / t, where P is power, W is work done, and t is time.
What is the unit of power?
The unit of power is watts (W).
What is the relationship between work done, power, and time?
Work done = power x time (W = Pt).
What is the formula for calculating potential energy?
PE = mgh, where PE is potential energy, m is mass, g is acceleration due to gravity, and h is height.
What is the formula for calculating elastic potential energy?
PE_elastic = 0.5 x k x x^2, where PE_elastic is elastic potential energy, k is spring constant, and x is extension.
What is the relationship between potential energy, kinetic energy, and total mechanical energy?
Total mechanical energy = potential energy + kinetic energy.
What is the formula for calculating total mechanical energy?
TME = PE + KE, where TME is total mechanical energy, PE is potential energy, and KE is kinetic energy.
