Motion in a Straight Line

Class 11 · Physics · 11 Questions

2.1beginner💡 Understand1 markMCQ

In which of the following examples of motion, can the body be considered approximately a point object:

2.3intermediate🔧 Apply3 marksNumerical

A woman starts from her home at 9.00 am, walks with a speed of 5 km h−1^{-1} on a straight road up to her office 2.5 km away, stays at the office up to 5.00 pm, and returns home by an auto with a speed of 25 km h−1^{-1}. Choose suitable scales and plot the x−tx-t graph of her motion.

2.4advanced🔧 Apply5 marksNumerical

A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward, followed again by 5 steps forward and 3 steps backward, and so on. Each step is 1 m long and requires 1 s. Plot the x−tx-t graph of his motion. Determine graphically and otherwise how long the drunkard takes to fall in a pit 13 m away from the start.

2.5intermediate🔧 Apply3 marksNumerical

A car moving along a straight highway with speed of 126 km h−1^{-1} is brought to a stop within a distance of 200 m. What is the retardation of the car (assumed uniform), and how long does it take for the car to stop?

2.6intermediate🔧 Apply5 marksNumerical

A player throws a ball upwards with an initial speed of 29.4 m s−1^{-1}.

2.7intermediate🔍 Analyze3 marksShort Answer

Read each statement below carefully and state with reasons and examples, if it is true or false; A particle in one-dimensional motion

2.8advanced🔧 Apply5 marksNumerical

A ball is dropped from a height of 90 m on a floor. At each collision with the floor, the ball loses one tenth of its speed. Plot the speed-time graph of its motion between t=0t = 0 to 12 s.

2.9intermediate💡 Understand5 marksLong Answer

Explain clearly, with examples, the distinction between:

2.10intermediate🔧 Apply5 marksNumerical

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km h−1^{-1}. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km h−1^{-1}. What is the

2.11beginner💡 Understand2 marksShort Answer

In Exercises 2.9 and 2.10, we have carefully distinguished between average speed and magnitude of average velocity. No such distinction is necessary when we consider instantaneous speed and magnitude of velocity. The instantaneous speed is always equal to the magnitude of instantaneous velocity. Why?

2.14intermediate🔧 Apply3 marksNumerical

A police van moving on a highway with a speed of 30 km h−1^{-1} fires a bullet at a thief’s car speeding away in the same direction with a speed of 192 km h−1^{-1}. If the muzzle speed of the bullet is 150 m s−1^{-1}, with what speed does the bullet hit the thief’s car? (Note: Obtain that speed which is relevant for damaging the thief’s car).