phys exam

Question 1

what are the standard units for weight?

Answer 1

newtons

Question 2

which metric prefix means 10 ^ -6

Answer 2

micro

Question 3

the slope on a position-time graph represents the…

Answer 3

velocity

Question 4

the relationship between force, mass, and acceleration is stated in…

Answer 4

newtons 2nd law of motion

Question 5

what does inertia depend on?

Answer 5

mass

Question 6

the force of gravitational attraction between earth and any object on earth is measured as…

Answer 6

weight

Question 7

according to newtons 3rd law, why don’t action-reaction force pairs cancel?

Answer 7

they act on different objects

Question 8

what is the equation for elastic potential energy?

Answer 8

EPE = 1/2 kx^2

Question 9

what is true of inelastic collisions?

Answer 9

the momentum of the system is conserved

Question 10

a skateboard moving down a flat road and coming to a stop is an example of…

Answer 10

kinetic friction

Question 11

a positively charged object is brought near a neutrally charged wall, causing the negative charge to come near the object. this is an example of…

Answer 11

charging by induction

Question 12

chad pushes off the ground to skate at a constant velocity. what must be true of his force?

Answer 12

his frictional force is equal to his applied force

Question 13

how are electrical force and distance related?

Answer 13

inversely squared: distances increases, force decreases with the square of the distance

Question 14

what are the units for electrical field?

Answer 14

newtons/coulomb

Question 15

if the charges between a pair of charged particles remain the same size but the distance between them cuts in half the force is…

Answer 15

quadrupled

Question 16

a +3 charge is placed near a +6 charge. the force acting on the +3 charge is 25 N the force acting on the +6 charge is…

Answer 16

25 N

Question 17

gravitational force is the same as…

Answer 17

weight

Question 18

what is the equation for work?

Answer 18

W=Fd

Question 19

what is the metric ladder (in order)?

Answer 19

kilo, hecto, deka, base unit, deci, centi, milli

Question 20

what is a vector?

Answer 20

includes both magnitude and direction

Question 21

what is newtons 3rd law?

Answer 21

for every action there is an equal and opposite reaction

Question 22

what is an elastic equation?

Answer 22

when 2 objects hit each other and bounce apart

Question 23

what is a parallel circuit?

Answer 23

a circuit with multiple loops. voltage is the same for all resistors, and if one light stops working all the other lights continue to work

Question 24

what type of wave is light?

Answer 24

electromagnetic and transverse wave

Question 25

what type of wave needs a medium to travel through?

Answer 25

mechanical wave

Question 26

what is the equation for frequency?

Answer 26

f = # waves/total time

Question 27

what is the equation for period?

Answer 27

T = total time/# waves

Question 28

what is an inelastic equation?

Answer 28

when 2 objects hit each other and either stick together or are deformed

Question 29

what is a series circuit?

Answer 29

a circuit that contains one loop. current stay the same throughout, and if one light stops working all the other lights stop working

Question 30

what is the conservation of energy?

Answer 30

energy cannot be created or destroyed, only transferred

Question 31

what is the equation and units for force?

Answer 31

F = ma (N, kg m/s^2)

Question 32

what is the equation for electrical force?

Answer 32

Fe = K q1 q2/d^2

Question 33

what is the equation and units for power?

Answer 33

P = wk/t (J/s, W)

Question 34

What’s the equation and units for momentum?

Answer 34

P = mv (kg m/s)

Question 35

what is the equation and units for impulse?

Answer 35

I = Ft (N x s)