Motion Science - Motion

What is the condition of an electromagnetic induction?

Which of the following is/ are true about retardation:

If the velocity of a body does not change, its acceleration is:

Our alternatives are given to each of the following incomplete statements/questions, choose the right answer.
Uniform circular motion is called continuously accelerated motion mainly because

Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10ms^-1. It implies that the boy is:

Displacement is a __________ quantity whereas distance is a Vector quantity. (Vector, Scalar, Constant)

The slope of a distance-time graph indicates __________ of a moving body. (Speed, Acceleration, Force)

__________ is the term used for negative acceleration. (Retardation, Deceleration, Friction)

If a body moves with uniform velocity, its acceleration is __________. (Zero, Constant, Increasing)

A bus starting from rest attains a velocity of 54 km/h in 60 s, its acceleration is __________. (0.25 m/s², 0.5 m/s², 1 m/s²)

On a straight line path, speed of a body is equal to its velocity.

There is no situation in the universe when velocity is zero but acceleration is non-zero.

We calculate average speed when the body is in non-uniform motion.

Displacement can be equal to, less than or greater than distance travelled.

Velocity of a body cannot be greater in magnitude than its speed.

What is the quantity which is measured by the area occupied below the velocity -time graph?

What does the path of an object look like when it is in uniform motion?

What does the odometer of an automobile measure?

Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?

Which of the following is true for displacement?

1. It cannot be zero.
2. Its magnitude is greater than the distance travelled by the object.

A stone is thrown in a vertically upward direction with a velocity of 5ms^-1. If the acceleration of the stone during its motion is 10ms^–2 in the downward direction, what will be the height attained by the stone and how much time will it take to reach there?

A racing car has a uniform acceleration of 4ms^-2. What distance will it cover in 10s after start?

A trolley, while going down an inclined plane, has an acceleration of 2cm s^-2. What will be its velocity 3 s after the start?

A train is travelling at a speed of 90km/h^–1. Brakes are applied so as to produce a uniform acceleration of – 0.5ms^-2. Find how far the train will go before it is brought to rest.

A bus starting from rest moves with a uniform acceleration of 0.1m/ s^-2 for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.

A ball is gently dropped from a height of 20m. If its velocity increases uniformly at the rate of 10m/ s^-2, with what velocity will it strike the ground? After what time will it strike the ground?

Fig shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:

1. Which of the three is travelling the fastest?
2. Are all three ever at the same point on the road?
3. How far has C travelled when B passes A?
4. How far has B travelled by the time it passes C?

A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0m/ s⁻² for 8.0s. How far does the boat travel during this time?

Abdul, while driving to school, computes the average speed for his trip to be 20km h⁻¹. On his return trip along the same route, there is less traffic and the average speed is 30km h⁻¹. What is the average speed for Abdul’s trip?

An athlete completes one round of a circular track of diameter 200m in 40s. What will be the distance covered and the displacement at the end of 2 minutes 20s?

An electron moving with a velocity of 5 × 104 m s^-1 enters into a uniform electric field and acquires a uniform acceleration of 104 m s^–2 in the direction of its initial motion. Calculate the time in which the electron would acquire a velocity double of its initial velocity. How much distance the electron would cover in this time?

The figure shows an x-t graph of a particle moving along a straight line. What is the sign of the acceleration during the intervals OA, AB, BC, and CD?

A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement–time graph is shown in Plot a velocity–time graph for the same.

A boy walks from his classroom to the bookshop along a straight corridor towards North. He covers a distance of 20m in 25 seconds to reach the bookshop. After buying a book, he travels the same distance in the same time to reach back in the classroom. Find (a) average speed, and (b) average velocity, of the boy.

Instruction: The table given below shows distance (in cm) travelled by the bodies A, B and C. Read this data carefully and answer the questions which follow.
Distance (in cm) covered by different bodies:

Time	Body A	Body B	Body C
1st second	20	20	20
2nd second	20	36	60
3rd second	20	24	100
4th second	20	30	140
5th second	20	48	180

1. Which of the bodies is moving with:

1. Constant speed?
2. Constant acceleration?

2. Which of the bodies covers:

1. Maximum distance in 3rd second?
2. Minimum distance in 3rd second?

3. Which of the bodies is moving with non-uniform acceleration?