Which of the following relations is correct?

1

(a)

Speed = Distance \(\times\) Time

(b)

\(Speed=\frac{Distance}{Time}\)

(c)

\(Speed=\frac{Time}{Distance}\)

(d)

\(Speed=\frac{1}{Distance\times\ Time}\)

What is the relation between distance and speed?

1

(a)

Distance = Speed \(\times\) Time

(b)

Distance = Speed/Time

(c)

Distance = Time/Speed

(d)

None of the above

How will you convert the speed given in km/h to m/s?

1

(a)

By multiplying with 5/16

(b)

By multiplying with 6/5

(c)

By multiplying with 18/5

(d)

By multiplying with 5/18

If we denote speed by S, distance by D and time by T, the relationship between these quantities is

1

(a)

S =D \(\times\) T

(b)

\(T=\frac{S}{D}\)

(c)

\(S=\frac{1}{T}\times D\)

(d)

\(S=\frac{T}{D}\)

Which one records the distance travelled by a vehicle?

1

(a)

Speedometer

(b)

Manometer

(c)

Motometer

(d)

Odometer

Time period of a pendulum depends on its_____________.

1

(a)

length

The symbols of all units are written in_____________

1

(a)

singular

A________________is one billionth of a second.

1

(a)

nanosecond

Motion of objects can be represented in the pictorial form by their__________graph.

1

(a)

distance-time

The distance-time graph for the motion of an object moving with a constant speed is a____________.

1

(a)

straight line

The distance-time graph of standing vehicle is a straight line parallel to x-axis.

1

(a) False

(b) True

The time period of simple pendulum is not constant.

1

(a) False

(b) True

The symbols of all units are written in singular.

1

(a) False

(b) True

The distance-time graph of standing vehicle is a straight line parallel to x-axis.

1

(a) False

(b) True

Periodic events are used for the measurement of time.

1

(a) False

(b) True

Give the basic unit of speed.

2

(a)

A simple pendulum is oscillating between two points A and B as shown in figure. Is the motion of the bob uniform or non-uniform?

2

(a)

Briefly explain how will decide which object is moving fast and which one is moving slow.

2

(a)

A spaceship travels 36000 km in one hour. Express its speed in km/s.

2

(a)

Which of the following are not correct?
(a) The basic unit of time is second.
(b) Every object moves with a constant speed.
(c) Distances between two cities are measured in kilometres.
(d) The time period of a given pendulum is not constant.
(e) The speed of a train is expressed in m/h.

3

(a)

Salma takes 15 min from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.

3

(a)

Suppose, the two photographs, shown in two figures had been taken at an interval of 10 s. If a distance of 100 m is shown by 1 cm in these photographs, then calculate the speed of the circled car.

3

(a)

Plot a distance-time graph of the tip of the second hand of a clock by selecting 4 points on X-axis and Y-axis, respectively. The circumference of the circle traced by the second hand is 64 cm.

3

(a)

Boojho goes to the football ground to play football. The distance-time graph of his journey from his home to the ground is given as figure.
(a) What does the graph between points B and C indicate about the motion of Boojho?
(b) Is the motion between 0 to 4 min uniform or non-uniform?
(c) What is his speed between 8 to 12 min of his journey.

5

(a)

Explain by giving example that how can we choose a suitable scale.

5

(a)