Short Physics Review Quiz 1

Question 1

Concerned with the calculation of the forces acting on and within structures that are in equilibrium.

Answer 1

Statistics

Question 2

What are the 2 force systems?

Answer 2

Concurrent & Non-concurrent

Question 3

Force Systems. Forces acts on COMMON POINT; the body DON’T ROTATE.
* Particle or point mass experience this.

Answer 3

Concurrent

Question 4

Force Systems. Forces acting on DIFFERENT POINTS; the object TENDS TO ROTATE.
* Occurs in rigid/extended body that does not change size and shape.

Answer 4

Non-concurrent

Question 5

Condition where there is no change in the state of motion of a body.

Answer 5

Equilibrium

Question 6

The body is at rest or in motion provided that the speed is constant and same direction.

Answer 6

Equilibrium

Question 7

The net force acting in an object in translational equilibrium is equal to 0

Answer 7

1st Condition of Equilibrium
Fnet = 0
Fx = 0 & Fy = 0

Question 8

An object is in ______________ if the sum of all the external forces acting on it is zero, Σ F = 0.

Answer 8

Translational Equilibrium

Question 9

Additional force needed to balance the resultant force if it is not equal to zero; equal in magnitude but opposite direction.

Answer 9

Equilibrant Force

Question 10

What are the 4 fundamental forces?

Answer 10

Gravitational Force
Electromagnetic Force
Weak Nuclear Force
Strong Nuclear Force

Question 11

Formula for gravitational force:

Answer 11

F(G) = G (m1m2)/r^2

Question 12

What is the gravitational constant (G)?

Answer 12

G = 6.67 x 10^-11 Nm^2/Kg^2

Question 13

Formula for electronic force:

Answer 13

F(e) = k (q1q2)/r^2

Question 14

What are the q1 and q2 in the electronic force formula?

Answer 14

Subatomic particles

Question 15

What is the electrostatic constant (k)?

Answer 15

k = 9 x 10^9 Nm^2/C^2

Question 16

Difference of gravitational force F(G) and electronic force F(e):

Answer 16

F(G) = focuses on large masses; macroscopic scale
F(e) = Deals with subatomic particles

Question 17

What is the acceleration and velocity in an equilibrium state?

Answer 17

a = 0
v = k (constant)

“it can be at rest or moving at constant velocity”