Chapter 3- Rectilinear Motion

Question 1

If acceleration occurs than the initial and final velocities will

Answer 1

Be different

Question 2

Rectilinear motion is

Answer 2

Motion along a straight path

Question 3

Instantaneous velocity

Answer 3

Velocity at an instant

Measurements taken over a time much shorter than the time of overall measurements

Question 4

Average velocity

Instantaneous velocity equations

Answer 4

1. Av= change in x/ change in time

2. In= dx/dt

Question 5

Equipment for a trolley experiment on a ramp

Answer 5

Light sensor
Runway
Lamp
Trolley
Interrupter card
Interface to computer

Question 6

S as a symbol

Answer 6

Displacement

m

Question 7

u as a symbol

Answer 7

Initial velocity (m/s)

Question 8

v as a symbol

Answer 8

Final velocity

m/s

Question 9

a as a symbol

Answer 9

Acceleration

m/s^2

Question 10

t as a symbol

Answer 10

Time

s

Question 11

1) v=u+at

Answer 11

Woop

Question 12

2) s= (u+v)t /2

Answer 12

Woop

Question 13

3) s=ut+0.5at^2

Answer 13

Woop

Question 14

4) v^2= u^2+2as

Answer 14

Woop

Question 15

What happens with absence of air resistance

Answer 15

Whatever the mass the object will fall freely with the same acceleration

Question 16

Acceleration of free fall on earth

Answer 16

9.82 m/s^2

Question 17

If upward velocity is assigned a positive value

Answer 17

Acceleration must be negative

-9.81m/s^2

Question 18

If body was thrown downwards than

Answer 18

Direction would be the same as that of g so both can be positive values

Question 19

Objects projected horizontally will

Answer 19

Still fall freely with a vertical downward acceleration of 9.8

Question 20

Equations of motion can be applied to vertical motion to get time spent by object in free fall

Answer 20

Then can be applied to get horizontal displacement (from time and horizontal velocity)

Question 21

Process of vertical and horizontal question

Answer 21

Vertical info
Into s= ut+0.5at^2

Then do horizontal info w such time
For s=u x t

Question 22

Displacement time graphs

Answer 22

Gradient = velocity

Question 23

Velocity time graph

Answer 23

Area under graph = displacement

Gradient= acceleration