Review

Question 1

Distance

Answer 1

The total move of an object without regard of direction

Question 2

Distance Si unit

Answer 2

Metre

Question 3

Speed

Answer 3

The rate at which an object is able to move or operate

Question 4

Speed Si unit

Answer 4

Meter per second

Question 5

How do you solve for speed

Answer 5

speed = distance / time

Question 6

difference between speed and velocity

Answer 6

speed is the rate of time an object is moving along a path
velocity is the rate and direction

Question 7

solve for velocity initial

Answer 7

velocity = speed / time

Question 8

an object travels 25 m in 5s. What is the velocity?

Answer 8

5 m/s

Question 9

what does constant velocity mean

Answer 9

An object moving the same distance every second.

Question 10

Acceleration and its units

Answer 10

the rate at which an object gain speed or velocity over time
(M/s2)

Question 11

solve for acceleration

Answer 11

a = vf - vi / t

Question 12

another name for negative acceleration

Answer 12

deceleration retardation

Question 13

a car changes from 10 m/s to 30 m/s in 8 seconds. what is the acceleration.

Answer 13

given tbd { delta d}
vi = 10 m/s (a)
vf = 30 m/s a = vf - vi / t
t = 8 s a = 30 - 10 = 20/ 8
a = 2.5 m/s2

Question 14

a bicycle moving at 10 m/s stops in 10 seconds. what is its acceleration?

Answer 14

given tbd { delta d}
vi = 0 (a)
vf = 10 a = 10 - 0 =10
t = 10 a = 1 m/s2

Question 15

constant acceleration

Answer 15

the change in velocity at a constant rate

Question 16

force and its si unit

Answer 16

force moves tends to move, stops or tends to stop the motion of an object. (Newton N)

Question 17

balanced forces

Answer 17

opposite in direction equal in size

Question 18

how does an object move if the forces on it are balanced

Answer 18

the objects movement wont b e affected

Question 19

how does an object move if the forces on it are unbalanced

Answer 19

an object will deviate from its original path it will displace or tilt the object

Question 20

friction

Answer 20

the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against eachother.

Question 21

newtons (1st, 2nd, 3rd) law of motion

Answer 21

1st) inertia an object at rest remains at rest,
an object in motion remains in motion at constant speed. unless acted upon by an unbalanced force.

2nd) f = ma

3rd) every action has an equal and opposite reaction.

Question 22

mass and its si unit

Answer 22

mass is the amount of matter in an object (kg)

Question 23

gravity

Answer 23

the force that attracts an object towards the center of the earth.

Question 24

how does gravity depend on mass

Answer 24

mass is what causes gravitational force, without it there would be no gravity

Question 25

the relationship between gravity and the distance between the masses

Answer 25

the more distance between masses the weaker the gravitational force

Question 26

weight and its si unit

Answer 26

The force of gravity on a mass (newton N)

Question 27

weight equation

Answer 27

weight = mass x gravitational field strength w = m x g

Question 28

momentum and its si unit

Answer 28

the product of mass and velocity (p) (kg m/s)

Question 29

law of conservation of momentum

Answer 29

the total momentum of a system is constant if no external force is acting on it.

Question 30

elastic collision and inelastic collision differences

Answer 30

elastic has no net loss in kinetic energy inelastic has a loss of kinetic energy

Question 31

explosion

Answer 31

rapid expansion in volume associated with an extreme outward release of energy.

Question 32

momentum and impulse are related by

Answer 32

the impulse experienced by an object is equal to the momentum

Question 33

difference between scalar and vector

Answer 33

vectors use direction scalar doesnt

Question 34

longitudinal waves

Answer 34

particles of the medium vibrate parallel to the motion of the wave.

Question 35

frequency of a wave with a speed of 0.4 m/s and wavelength of 0.020 m

Answer 35

f = v/f f= 0.4/ 0.020 f = 20 Hz

Question 36

a period (T) of 0.005 seconds would be equal to a frequency of

Answer 36

200 Hz

Question 37

what type of wave travels at right angles to the energy transfer

Answer 37

transverse waves

Question 38

what type of wave has areas of rarefaction and compression

Answer 38

longitudinal waves

Question 39

what wave transmits from one place to others

Question 40

the distance between two consecutive troughs or crests is

Answer 40

wavelength

Question 41

the law of conservation of energy

Answer 41

the total energy of an isolated system is constant

Question 42

what happens to an object's potential energy when it is taken to a high altitude

Answer 42

its potential energy increases

Question 43

energy

Answer 43

the ability to do work

Question 44

the rate of change of work

Answer 44

power

Question 45

power and its unit

Answer 45

the amount of energy used (watt) (p)

Question 46

potential energy is

Answer 46

energy that has potential to become another form of energy

Question 47

work done formula

Answer 47

W = Fd Work = Force x Displacement

Question 48

an object mass 0.2 kg velocity 0.5m/s kinetic energy ?

Question 49

work =100 j t = 20 s power ?

Question 50

what quantity is equal to newton-meter

Answer 50

Joule

Question 51

law of reflection

Answer 51

the angle of reflection equals the angle of incidencfe

Question 52

joule/second is = to which si unit

Answer 52

Watt

Question 53

force 10 N distance 5m force = to displacement what is the total work done

Question 54

20* C to K =

Question 55

force = 20 N mass = 3kg distance = 4m f = perpendicular to 4m work ?

Question 56

heat is

Answer 56

the energy transferred from on object to another as result in a difference of temperature

Question 57

when an object cools down molecules

Answer 57

it loses its kinetic energy and slows down

Question 58

what is not a good conductor of heat

Answer 58

plastic, wood, rubber

Question 59

electricity is

Answer 59

the flow of electrons

Question 60

cell and battery difference

Answer 60

cells convert chemical energy into electrical energy battery is a group of cells that store electricity on chemical potential energy

Question 61

which side of a cell is positive

Answer 61

the long side

Question 62

coulomb is a unit for

Answer 62

electric charge

Question 63

direct current is

Answer 63

one directional flow of electric charge

Question 64

what is used to measure current

Answer 64

ampere

Question 65

how must the ammeter be connected in a circuit

Question 66

what unit is resistance measured in

Answer 66

ohm

Question 67

Ohm's law states

Answer 67

The current through a conductor between two points is directly proportional to the voltage across two points