Motion and Time Test

Result

Motion and Time Test - 18

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Question 1
1 / -0

Match the situations given in column I with the possible curves in column II and select the correct option, from codes given

A
(a) $$\rightarrow$$ (q), (b) $$\rightarrow$$ (8), (c) $$\rightarrow$$ (p). (d) $$\rightarrow$$ (r)

B
(a) $$\rightarrow$$ (s,r). (b) $$\rightarrow$$ (q), (c) $$\rightarrow$$ (s), (d) $$\rightarrow$$ (p)

C
(a) $$\rightarrow$$(q,s); (b) $$\rightarrow$$ (r), (c) $$\rightarrow$$ (p), (d) $$\rightarrow$$ (s)

D
(a) $$\rightarrow$$(s), (b) $$\rightarrow$$ (q,p), (c) $$\rightarrow$$ (s), (d) $$\rightarrow$$ (r)

Solution
Question 2
1 / -0

A rod of length/leans by its upper end against a smooth vertical wall while its other end leans against the floor. The end that leans against the wall moves uniformly downwards. Then:

A
The other end also moves uniformly.

B
The speed on other end goes on increasing.

C
The speed on other end goes on decreasing.

D
The speed on other end first decreasing and then increasing.

Solution
Question 3
1 / -0

In a damped oscillator, the mass of the oscillator is m = 200g, force constant is K = 90N/m and the damping constant b is 40 g/s. Find the time taken for its mecharical energy to drop to half its initial value

A
0.3s

B
0.208 s

C
6.93s

D
3.46s

Solution
Question 4
1 / -0

Two cyclists, k km apart, and starting at the same time, would be together In r hours if they travelled in the same direction, but would pass each other In t hours if they travelled in opposite directions. The ratio of the speed of the faster cyclist to that of the slower is ____

A
$$\frac{r+t}{r-t}$$

B
$$\frac{r}{r-t}$$

C
$$\frac{r+t}{r}$$

D
$$\frac{r}{t}$$

Solution
Question 5
1 / -0

Directions For Questions

Arrange the following speeds in the increasing order

...view full instructions

$$a$$. A boy moving on a bicycle with a speed of $$18~ km/h$$.
$$b$$. A fast runner running with a speed of $$10 ~m/s$$.
$$c$$. A scooter moving with a speed of $$800 ~m/min$$.

A
$$c > b > a$$

B
$$b > c > a$$

C
$$a> b > c$$

D
$$c > a > b$$

Solution
Question 6
1 / -0

When can we tell which vehicle is moving fast or slow?

A
When the vehicles are moving on a road in the same direction

B
When the vehicles are moving on a road in different directions

C
When the vehicles are moving on a road at the same time

D
When the vehicles are moving on a road at different times

Solution

When the vehicles are moving on a road in the same direction, we we tell which vehicle is moving fast or slow, thus option $$A$$ is correct
Question 7
1 / -0

Look at first figure. It shows the position of some vehicles moving on a road in the same direction at some instant of time. Now look at second figure. It shows the position of the same vehicles after some time, which vehicle is moving the fastest of all?

A
Red

B
White

C
Yellow

D
Green

Solution

According to the given images, the green one moves the fastest as it covers largest distance in the time interval, thus option $$D$$ is correct.Other vehicles have covered less distance compared to green car.
Question 8
1 / -0

The faster vehicle has ______.

A
covered same distance in the time interval

B
a higher speed

C
covered less distance in the time interval

D
taken more time to cover the small distance

Solution

$$Speed=\dfrac{Distance}{Time}$$ .It means speed is how fast or how slow distance is being covered by car in a particular time.
So since the vehicle is said to be faster so it covers comparatively larger distances in same time.
So we say that the faster vehicle has a higher speed, thus option $$B$$ is correct
Question 9
1 / -0

Which of the following is true?

A
In a race, the one who takes longest time to cover the distance of the race has the highest speed

B
In a race, the one who takes shortest time to cover the distance of the race has the slowest speed

C
In a race, the one who takes shortest time to cover the distance of the race has the highest speed

D
None of these

Solution

In a race of a given distance, the one who takes shortest time to cover thedistance of the race has the highest speed, thus option $$C$$ is correct
Question 10
1 / -0

How can we know which vehicle is moving faster or slower?

A
By measuring time taken by the vehicle to cover a distance

B
By measuring the total distance covered by a vehicle

C
By measuring total time taken by the vehicle

D
None of these

Solution

The distance moved by objects in a given interval of time can help us to decide which one is faster or slower, thus option $$A$$ is correct.