Motion and Time...

A person starts from point A towards point B following a straight path. After touching the point B, he returns to the point A along the same path. During the journey from A to B, he travels at a constant speed of 40 m/s and from B to A, he travels at a constant speed of 60 m/s. What is the average speed for the whole journey?

A motorist drives north for 30 minutes at 50 miles per hour and then stops for 10 minutes. He then continues towards north travelling 20 miles in 20 minutes. What is the average speed for the whole journey (in miles per hour))?

A person started from point 'O' and travelled 10 km towards east. Then, he turned left and travelled another 8 km. After that, he turned left again and travelled 4 km. He covered the whole journey in 2 hours. What was the average velocity of the person for the whole journey?

A person is moving along a circular path of radius 70 m. If he completes one round in 220 seconds, then the average speed of the person is

Which of the following depicts the correct distance-time graph for a stationary body?

What can you say about the motion of an object whose distance-time graph is a straight line inclined to the time axis?

Three graphs are shown below. Choose the correct statement from among the following:

The distance-time graph for two bodies A and B is shown in the figure below. Which of the following statements is correct?

Consider the distance-time graph shown below:



During which interval does the velocity of the particle become zero?

Consider the two pendulums A and B shown below and choose the correct option showing the relationship between their time periods.

What is the distance travelled by the person from the 6^th second to the 8^th second?

What is the speed of the person for the first 6 seconds?

Karan left his house at 10:00 a.m. for the market. On the way to the market, he stopped to talk to a friend. The distance-time graph for his complete journey is shown below:



Match the statements in Column - I with the values in Column - II:

Two clocks A and B are shown in the figure below. Clock A has an hour hand and a minute hand, whereas clock B has an hour hand, a minute hand and a second hand. Which of the following statements are correct?



(A) Time interval of 30 seconds can be measured by clock A.
(B) Time interval of 30 seconds can be measured by clock B.
(C) Time interval of 5 minutes can be measured by both the clocks.
(D) Time interval of 4 minutes and 15 seconds can be measured by both the clocks.

Consider the following diagram which shows a pendulum oscillating and its positions at various times.

The time taken by the bob to move from A to C is 1 second and from C to O is 3 seconds. Find the time period of this pendulum.

A man on tour travels the first 160 km at 64 km/hr and the next 160 km at 80 km/hr. What is the average speed for the tour?

A ball moves at 120 metres per second and strikes an object in three seconds. If it moves at the speed of 100 metres per second, how long will it take for the ball to strike the same object?

An ant moves from A to B and then to C. What is the magnitude of its displacement?

The graph below represents

A simple pendulum takes 15 seconds to complete 5 oscillations. What is the time period of the pendulum?