Chapter 2 – Motion in a Straight Line
Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 2 - Motion in a Straight Line
The speed-time graph of a particle moving along a fixed direction is shown in the figure. Obtain the distance traversed by the particle between (a) t=0s to t=10s (b) t = 2 s to 6 s. What is the average speed of the particle over the interval in a and b.
27
Nov
The speed-time graph of a particle moving along a fixed direction is shown in the figure. Obtain the distance traversed by the particle between (a) t=0s to t=10s (b) t = 2 s to 6 s. What is the average speed of the particle over the interval in a and b. A woman starts from [...]
On a long horizontally moving belt (Fig.), a child runs to and from with a speed 9kmh^−1 (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of 4kmh^−1 . For an observer on a stationary platform outside, what is the (a) speed of the child running in the direction of motion of the belt ? (b) speed of the child running opposite to the direction of motion of the belt ? (c) time taken by the child in (a) and (b)
27
Nov
On a long horizontally moving belt (Fig.), a child runs to and from with a speed 9kmh^−1 (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of 4kmh^−1 . For an observer on a stationary platform outside, what is the [...]
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A woman starts from her home at 9.00 am ,
and returns home by an auto with a speed of 25 km h^–1. Choose suitable scales and plot the x-t graph of her motion. ,
On a long horizontally moving belt (Fig.) ,
stays at the office up to 5.00 pm ,
walks with a speed of 5 km h^–1 on a straight road up to her office 2.5 km away ,
Look at the graphs (a) to (d) carefully and state, with reasons, which of these cannot possibly represent one-dimensional motion of a particle.
27
Nov
Look at the graphs (a) to (d) carefully and state, with reasons, which of these cannot possibly represent one-dimensional motion of a particle. Look at the graphs (a) to (d) carefully and state which of these cannot possibly represent one-dimensional motion of a particle. with reasons November 27, 2020 Category: Chapter 2 - Motion in [...]
On a two lane road, car A is travelling with a speed of 36 km h^−1 . two cars B and C approach car A in opposite directions with a speed of 54 km h^−1 each. At a certain instant, when the distance AB is equal to AC, both being 1 km, B decides to overtake A before C does. What minimum acceleration of car B is required to avoid an accident?
27
Nov
On a two lane road, car A is travelling with a speed of 36 km h^−1 . two cars B and C approach car A in opposite directions with a speed of 54 km h^−1 each. At a certain instant, when the distance AB is equal to AC, both being 1 km, B decides to [...]
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B decides to overtake A before C does. What minimum acceleration of car B is required to avoid an accident? ,
both being 1 km ,
car A is travelling with a speed of 36 km h^−1 . two cars B and C approach car A in opposite directions with a speed of 54 km h^−1 each. At a certain instant ,
On a two lane road ,
when the distance AB is equal to AC ,
A ball is dropped from a height of 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 = 0 to 12 s.
27
Nov
A ball is dropped from a height of 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 = 0 to 12 s. A ball is dropped from a height [...]
A boy standing on a stationary lift ( open from above ) thrown a ball upwards with the maximum initial speed he can, equal to 49ms^−1. How much time does the ball take to return to his hands ? If the lift starts moving up with a uniform speed of 5ms^−1 and the boy again throws the ball up with the maximum speed he can , how hoes the ball take to return to his hands ?
27
Nov
A boy standing on a stationary lift ( open from above ) thrown a ball upwards with the maximum initial speed he can, equal to 49ms^−1. How much time does the ball take to return to his hands ? If the lift starts moving up with a uniform speed of 5ms^−1 and the boy again [...]
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A boy standing on a stationary lift ( open from above ) thrown a ball upwards with the maximum initial speed he can ,
A woman starts from her home at 9.00 am ,
and returns home by an auto with a speed of 25 km h^–1. Choose suitable scales and plot the x-t graph of her motion. ,
stays at the office up to 5.00 pm ,
walks with a speed of 5 km h^–1 on a straight road up to her office 2.5 km away ,
A woman starts from her home at 9.00 am, walks with a speed of 5 km h^–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. Choose suitable scales and plot the x-t graph of her motion.
27
Nov
A woman starts from her home at 9.00 am, walks with a speed of 5 km h^–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. Choose suitable scales and plot the [...]
The velocity- displacement graph of a particle is shown in figure. (a) Write the relation between v and x. (b) Obtain the relation between acceleration and displacement and plot it.
31
Oct
The velocity- displacement graph of a particle is shown in figure. (a) Write the relation between v and x. (b) Obtain the relation between acceleration and displacement and plot it. The velocity- displacement graph of a particle is shown in figure. (a) Write the relation between v and x. (b) Obtain the relation between acceleration [...]
A ball is dropped from a building of height 45m. Simultaneously another ball is thrown up with a speed 40m/s. Calculate the relative speed of the balls as a function of time.
31
Oct
A ball is dropped from a building of height 45m. Simultaneously another ball is thrown up with a speed 40m/s. Calculate the relative speed of the balls as a function of time. A ball is dropped from a building of height 45m. Simultaneously another ball is thrown up with a speed 40m/s. Calculate the relative [...]
A man runs across the roof of a tall building and jumps horizontally on to the (lower) roof of an adjacent building. If his speed is 9 m s⁻¹ and the horizontal distance between the building is 10 m and the height difference between the roofs is 9 m. Will he be able to land on the next building? (Take g = 10 m s⁻²).
31
Oct
A man runs across the roof of a tall building and jumps horizontally on to the (lower) roof of an adjacent building. If his speed is 9 m s⁻¹ and the horizontal distance between the building is 10 m and the height difference between the roofs is 9 m. Will he be able to land [...]