Review 1 - Physics Finals

Front

What is the formula for calculating the electric field (E) due to a point charge (Q) at a distance (r)?

Back

E = k * |Q| / r², where k is Coulomb's constant (8.99 x 10^9 N m²/C²).

Front

Define net force in the context of motion.

Back

Net force is the vector sum of all the forces acting on an object, determining its acceleration according to Newton's second law (F = ma).

Front

What is centripetal force and when does it act on an object?

Back

Centripetal force is the net force directed towards the center of a circular path, acting on an object moving in a circle.

Front

How do you calculate acceleration when given initial velocity, final velocity, and time?

Back

Acceleration (a) = (final velocity - initial velocity) / time.

Front

What is the principle of conservation of energy in the context of roller coasters?

Back

The total mechanical energy (potential + kinetic) of a roller coaster remains constant if only conservative forces are acting.

Front

What is the formula for calculating gravitational potential energy (PE)?

Back

PE = m * g * h, where m is mass, g is acceleration due to gravity (9.81 m/s²), and h is height.

Front

Define kinetic energy (KE) and its formula.

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 * m * v², where m is mass and v is velocity.

Front

What is the relationship between force, mass, and acceleration according to Newton's second law?

Back

F = m * a, where F is force, m is mass, and a is acceleration.

Front

How do you calculate the force required to stop an object?

Back

Force = mass * (change in velocity / time).

Front

What is the significance of the radius in circular motion?

Back

The radius affects the centripetal force required to keep an object moving in a circular path; smaller radius requires greater force.