Physics
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 [...]
A mass attached to a spring is free to oscillate, with angular velocity ω, in a horizontal plane without friction or damping. It is pulled to a distance x0 and pushed towards the centre with a velocity v0 at time t = 0. Determine the amplitude of the resulting oscillations in terms of the parameters ω,x0 and v0 . [Hint : Start with the equation x=a cos(ωt+θ) and note that the initial velocity in negative.]
13
Nov
A mass attached to a spring is free to oscillate, with angular velocity ω, in a horizontal plane without friction or damping. It is pulled to a distance x0 and pushed towards the centre with a velocity v0 at time t = 0. Determine the amplitude of the resulting oscillations in terms of the parameters [...]
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A mass attached to a spring is free to oscillate ,
In Millikan's oil drop experiment ,
The cylindrical tube of a spray pump has a cross-section of 8.0 cm^2 one end of which has 40 fine holes each of diameter 1.0 mm. If the liquid flow inside the tube is 1.5 m min^−1 ,
Two narrow bores of diameters 3.0mm and 6.0 mm are joined together to form a U-shaped tube open at both ends. If the U-tube contains water ,
what is the speed of ejection of the liquid through the holes ? ,
with angular velocity ω ,
A body describes simple harmonic motion with an amplitude of 5 cm and a period of 0.2 s. Find acceleration and velocity of the body when the displacement is
13
Nov
A body describes simple harmonic motion with an amplitude of 5 cm and a period of 0.2 s. Find acceleration and velocity of the body when the displacement is A body describes simple harmonic motion with an amplitude of 5 cm and a period of 0.2 s. Find acceleration and velocity of the body when [...]
A circular disc of mass 10 kg is suspended by a wire attached to its centre. The wire is twisted by rotating the disc and released. The period of torsional oscillation is found to be 1.5 s. The radius of the disc is 15 cm. Determine the torsional spring constant of the wire. (Torsional spring constant α is defined by the relation J=−αθ, where J is the restoring couple and θ the angle of twist).
13
Nov
A circular disc of mass 10 kg is suspended by a wire attached to its centre. The wire is twisted by rotating the disc and released. The period of torsional oscillation is found to be 1.5 s. The radius of the disc is 15 cm. Determine the torsional spring constant of the wire. (Torsional spring [...]
Tags:
In Millikan's oil drop experiment ,
The cylindrical tube of a spray pump has a cross-section of 8.0 cm^2 one end of which has 40 fine holes each of diameter 1.0 mm. If the liquid flow inside the tube is 1.5 m min^−1 ,
Two narrow bores of diameters 3.0mm and 6.0 mm are joined together to form a U-shaped tube open at both ends. If the U-tube contains water ,
what is the speed of ejection of the liquid through the holes ? ,