Motion and Time Test

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Motion and Time Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

Speed can be defined as :

A
$$\dfrac{Distance }{time}$$

B
$$\dfrac{Distance }{{Time}^2}$$

C
$$\dfrac{Time}{Distance}$$

D
$$None\ of\ the\ above$$

Solution

Speed of the body is defined as the distance travelled by the body in unit time.
Mathematically, $$Speed = \dfrac{Distance}{time}$$
Question 2
1 / -0

According to SI system, the standard unit of time is :

A
minute

B
hour

C
day

D
second

Solution

According to SI system, the standard unit of time is second.
Question 3
1 / -0

In distance-time graph, which of the following is plotted on the y-axis?

A
speed

B
distance

C
time

D
none of the above

Solution

In the distance-time graph, time is plotted on the x-axis, and distance is plotted on the y-axis as distance depends on time.
Question 4
1 / -0

In the given distance-time graph, what is the distance corresponding to $$4\ \text{min}$$?

A
$$2\ km$$

B
$$3\ km$$

C
$$4\ km$$

D
$$5\ km$$

Solution

Draw a line parallel to the y-axis at $$4 \ \text{min}$$ point. Then draw a line parallel to the x-axis from this point. This line will intersect the y-axis at $$4 \ km$$.
Question 5
1 / -0

In distance-time graph, which of the following is plotted on the x-axis?

A
speed

B
distance

C
time

D
none of the above

Solution

In distance-time graph, time is plotted on x-axis and distance is plotted on y-axis. distance travel always depends on time, ie $$D=\displaystyle f(t)$$.
Question 6
1 / -0

Which of the following are examples of non-uniform motion along a straight line?

A
horse pulling a cart

B
brakes applied on a fast moving car

C
train on a straight bridge

D
all of the above

Solution

In non-uniform motion, the speed of the object changes along a straight line. It may increase or decrease for different intervals of time. When brakes are applied, the car decelerates and its speed changes with time. So applying brakes on a fast moving car is the example of non-uniform motion.
Question 7
1 / -0

Gradient of line of displacement-time graph gives the :

A
acceleration

B
velocity

C
displacement

D
none of these

Solution

Slope of line of displacement time graph$$=\cfrac { ds }{ dt } $$
The rate of change of position i.e., rate of change of displacement with time is called velocity
Question 8
1 / -0

Speed of a body depends on

A
Time

B
Mass of the body

C
Distance travelled by the body

D
Both A and C

Solution

Speed is defined as

$$Speed = \dfrac{\text{Distance travelled}}{\text{Time interval}}$$

Hence speed depends both on time and distance travelled by the body.
So both A and C are correct.
Question 9
1 / -0

Name one unit of time bigger than a second.

A
plank time

B
zeptosecond

C
picosecond

D
kilosecond

Solution

$$1\ kilosecond=1000\ seconds$$
Question 10
1 / -0

Rain is falling vertically with a speed of 1.7 m/s. A girl is walking with speed of 1.0 m/s in the N - E (north-east) direction. To shield herself she holds her umbrella making an approximate angle $$\theta $$ with the vertical in a certain direction. Then

A
$$\theta=60^0 \:in \:N - E \:direction$$

B
$$\theta=30^0 \:in \:N - E \:direction$$

C
$$\theta=60^0 \:in \:S - W \:direction$$

D
$$\theta=30^0 \:in \:S - W \:direction$$

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Re-Attempt Weekly Quiz Competition

Motion and Time Test - 8

Result

Motion and Time Test - 8

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SHARING IS CARING

Question 1

$$\dfrac{Distance }{time}$$

$$\dfrac{Distance }{{Time}^2}$$

$$\dfrac{Time}{Distance}$$

$$None\ of\ the\ above$$

Solution

Question 2

minute

hour

day

second

Solution

Question 3

speed

distance

time

none of the above

Solution

Question 4

$$2\ km$$

$$3\ km$$

$$4\ km$$

$$5\ km$$

Solution

Question 5

speed

distance

time

none of the above

Solution

Question 6

horse pulling a cart

brakes applied on a fast moving car

train on a straight bridge

all of the above

Solution

Question 7

acceleration

velocity

displacement

none of these

Solution

Question 8

Time

Mass of the body

Distance travelled by the body

Both A and C

Solution

Question 9

plank time

zeptosecond

picosecond

kilosecond

Solution

Question 10

$$\theta=60^0 \:in \:N - E \:direction$$

$$\theta=30^0 \:in \:N - E \:direction$$

$$\theta=60^0 \:in \:S - W \:direction$$

$$\theta=30^0 \:in \:S - W \:direction$$

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