Phy 1 - Translational Motion

Question 1

How do you calculate displacement ?

Answer 1

The change in displacement is the final distance minus the initial distance

Question 2

Define distance in terms of Physics ?

Answer 2

The magnitude or size of displacement between two positions

Question 3

Define distance travelled in terms of Physics ?

Answer 3

The total length of the path travelled between two positions. This is not always the same as displacement.

Question 4

Define displacement ?

Answer 4

The change in position of an object

Question 5

Define 10 Scaler Quantities ?

Answer 5

Distance, Speed, Time, Temperature, Mass, Area, Volume, Energy, Entropy, Electric charge

Question 6

Define 7 Vector Quantities ?

Answer 6

Displacement, Acceleration, Momentum, Electrical Field, Velocity, Force, Gravitational Field

Question 7

Define Speed in terms of Physics ?

Answer 7

The rate of change of distance in relation to time

Question 8

Is Speed a scaler or a Vector quantity ?

Answer 8

Scaler

Question 9

Define Velocity in terms of Physics ?

Answer 9

The rate of change of displacement over time

Question 10

Is Velocity a Scaler or a Vector ? Why ?

Answer 10

It is a vector, because it has both direction and magnitude

Question 11

Define Instantaneous Velocity ?

Answer 11

The Velocity at a given point in time

Question 12

How do you calculate Instantaneous Velocity ?

Answer 12

Calculated from a Distance/Time graph: For a straight line graph it is the average slope of the line that bisects the time in question. For a curved line graph it is the slope at the specified time, solved by using Pythagoras’ Theorem.

Question 13

Define acceleration

Answer 13

The rate of change of velocity with respect to time

Question 14

What is the formula for velocity ?

Answer 14

Question 15

Is velocity a scaler or a vector ? What are its unit ?

Answer 15

Vector because it has both magnitude and direction

ms^-2

Question 16

What is the term for negative acceleration

Answer 16

Deceleration

Question 17

How do you calculate the area of a rectangle ?

Answer 17

Question 18

How do you calculate the area of a triangle ?

Answer 18

Question 19

How would you calculate the area under a curve of a graph ?

Answer 19

Count the boxes !

Question 20

How would you calculate displacement from a velocity/time graph ?

Answer 20

Take the area under the line or the curve of the graph

Question 21

What is meant by uniformly accelerated motion ?

Answer 21

The magnitude and direction of the acceleration of a system are solely determined by the exterior forces acting on the system.

If the magnitude of these forces is constant, the magnitude of the accelereation will be constant, which results in uniformly accelerated motion.

Question 22

What is meant by translational motion ?

Answer 22

The motion of the centre of gravity of a system through space.

Question 23

What is the formula for uniformly accelerated motion ?

Answer 23

X = X₀ + V_Ot + 1/2 at ²

Question 24

What is Kinematics ?

Answer 24

The study of objects in motion with respect to space and time

Question 25

With respect to kinematics, v = ?

Answer 25

V = Vo + at