Question

Part one: Multiple choices

1) A person sitting in the compartment of moving train is:
a) in the state of rest with respect to surroundings of the compartment,
b) in the state of motion with respect to surroundings of the compartment.
C) in the state of rest with respect to surroundings outside of the compartment
d)all of them

2) The motion of tuning fork prongs on vibration is:
a) Linear motion
b) periodic motion
c) circular motion
d) projectile motion
3) All the following are periodic motion except
a) moving car in straight line
b) Earth's rotation
c) pendulum
d) Swing
4) The rate of change of displacement is:
a) Acceleration
b) force
c) distance
d) velocity
5) When an object moves at negative acceleration in a straight line its:
a) displacement equals zero
b) velocity decrease
C) velocity increase
d) none of them
6) When the object speeds up its acceleration:
a) decreases
b) increases c) it has no acceleration d) All of them
7) The rate of change of velocity is:
a) force
b) variable velocity
c) instantaneous velocity
d) acceleration
8) If a train is moving in a straight line to cover a distance of 600 m in a minute its
velocity is:
a) 600 m/s
b) 60 m/s c) 100 m/s d) 480 m/s
9) The division between total displacement and total time is the:
a) variable velocity b) average velocity c) speed d) Instantaneous velocity
10) The rate of change of displacement at a given instant is called the
a) average velocity
b) instantaneous velocity
C) average velocity
d) instantaneous acceleration
11) A body completes one circular revolution in a roundabout whose diameter
140 m.
Find its displacement,
a) 439.6 m
b) 440 m
c) zero
d) 879.2 m​

Answer 1

1)

a) in the state of rest with respect to surroundings of the compartment,

2)

b) periodic motion

3)

a) moving car in a straight line

4)

d) velocity

5)

b) velocity decrease

6)

b) increases

7)

d) acceleration

8)

10 m/s

9)

b) average velocity

10)

b) instantaneous velocity

11)

a) 439.6 m

Step-by-step explanation:

1)

With respect to the inside surrounding the person will be at rest. Because the person is not moving inside the compartment.

2)

The vibration motion follows periodic motion.

3)

The car moving in a straight line is an example of rectilinear motion and its wheels are in rotational motion. They are not in periodic motion.

4)

Definition of velocity.

5)

Acceleration is the rate of change of velocity. So negative acceleration means a decrease in velocity.

6)

Acceleration is the rate of change of velocity. So an increase in velocity means an increase in acceleration.

7)

Definition of acceleration.

8)

`velocity = (Distance)/(Time)\\\\velocty = (600\ m)/(1\ min)(1\ min)/(60\ s)\\\\velocity = 10\ m/s`

Hence, none of the options is correct. The correct answer is 10 m/s.

9)

Definition of average velocity.

10)

Definition of instantaneous velocity.

11)

`Displacement = Circumference = \pi d\\Displacement = \pi(140\ m)\\Displacement = 439.6\ m`