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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 [...]
Three children are sitting on a see-saw in such a way that it is balanced. A 20kg and a 30kg boy are on opposite sides at a distance of 2m from the pivot. If the third boy jumps off, thereby destroying balance, then the initial angular acceleration of the board is: (Neglect weight of board)
27
Nov
Three children are sitting on a see-saw in such a way that it is balanced. A 20kg and a 30kg boy are on opposite sides at a distance of 2m from the pivot. If the third boy jumps off, thereby destroying balance, then the initial angular acceleration of the board is: (Neglect weight of board) [...]
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then the initial angular acceleration of the board is: (Neglect weight of board) ,
thereby destroying balance ,
Three children are sitting on a see-saw in such a way that it is balanced. A 20kg and a 30kg boy are on opposite sides at a distance of 2m from the pivot. If the third boy jumps off ,
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 ,
A triangular plate of uniform thickness and density is made to rotate about an axis perpendicular to the plane of the paper (a) passing through A, (b) passing through B, by the application of the same force F, at C (mid-point of AB) as shown. Now,
27
Nov
A triangular plate of uniform thickness and density is made to rotate about an axis perpendicular to the plane of the paper (a) passing through A, (b) passing through B, by the application of the same force F, at C (mid-point of AB) as shown. Now, (b) passing through B A triangular plate of uniform [...]
A rectangular block of mass M and height a is resting on a smooth level surface. A force F is applied to one corner as shown in figure. At what point should a parallel force 3F be applied in order that the block shall undergo pure translational motion? Assume normal contact force between the block and surface passes through the centre of gravity of the block.
27
Nov
A rectangular block of mass M and height a is resting on a smooth level surface. A force F is applied to one corner as shown in figure. At what point should a parallel force 3F be applied in order that the block shall undergo pure translational motion? Assume normal contact force between the block [...]
A cord is wrapped on a pulley (disk) of mass M and radius R as shown in fig. To one end of the cord, a block of mass M is connected as shown and to other end in (a) a force of 2 Mg and in (b) a block of mass 2M. Let angular acceleration of the disk in A and B is α2 and αB , respectively, then: (cord is not slipping on the pulley)
27
Nov
A cord is wrapped on a pulley (disk) of mass M and radius R as shown in fig. To one end of the cord, a block of mass M is connected as shown and to other end in (a) a force of 2 Mg and in (b) a block of mass 2M. Let angular acceleration [...]
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a block of mass M is connected as shown and to other end in (a) a force of 2 Mg and in (b) a block of mass 2M. Let angular acceleration of the disk in A and B is α2 and αB ,
A cord is wrapped on a pulley (disk) of mass M and radius R as shown in fig. To one end of the cord ,
respectively ,
then :(cord is not slipping on the pulley) ,
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 ,