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A particle moves so that its position vector is given by r = cosωtx^ + sinωty^. Where ω is a constant. Which of the following is true?
28
Aug
A particle moves so that its position vector is given by r = cosωtx^ + sinωty^. Where ω is a constant. Which of the following is true? A particle moves so that its position vector is given by r = cosωtx^ + sinωty^. Where ω is a constant. Which of the following is true? August [...]
Two metal beams are joined together by four rivets, as the drawing indicates. Each rivet has a radius of 5.0 × 10^−3 m and is to be exposed to a shearing stress of no more than 5.0 × 10^8 Pa. What is the maximum tension T that can be applied to each beam, assuming that each rivet carries one-fourth of the total load?
28
Aug
Two metal beams are joined together by four rivets, as the drawing indicates. Each rivet has a radius of 5.0 × 10^−3 m and is to be exposed to a shearing stress of no more than 5.0 × 10^8 Pa. What is the maximum tension T that can be applied to each beam, assuming that [...]
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as the drawing indicates. Each rivet has a radius of 5.0×10−3 m and is to be exposed to a shearing stress of no more than 5.0×108 Pa. What is the maximum tension →TT→ that can be applied to each beam ,
assuming that each rivet carries one-fourth of the total load? ,
Two metal beams are joined together by four rivets ,
he position vector of a particle R as a function of time is given by R = 4 sin (2πt) i^ + 4 cos (2πt) j^ Where R is in meters, t is in seconds and i^ and j^ denote unit vectors along x and y-directions, respectively. Which one of the following statements is wrong for the motion of particle?
28
Aug
he position vector of a particle R as a function of time is given by R = 4 sin (2πt) i^ + 4 cos (2πt) j^ Where R is in meters, t is in seconds and i^ and j^ denote unit vectors along x and y-directions, respectively. Which one of the following statements is wrong [...]
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Chapter 10 - Circular Motion
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he position vector of a particle R as a function of time is given by R = 4 sin (2πt) i^ + 4 cos (2πt) j^ Where R is in meters ,
respectively. Which one of the following statements is wrong for the motion of particle? ,
t is in seconds and i^ and j^ denote unit vectors along x and y-directions ,
Two particles are located on a horizontal plane at a distance `60 m`. At `t = 0` both the particles are simultaneously projected at angle `45^@` with velocities `2 ms^-1 and 14 m s^-1`, respectively. Find (a) Minimum separation between them during motion. (b) At what time is the separation between them minimum ?
28
Aug
Two particles are located on a horizontal plane at a distance `60 m`. At `t = 0` both the particles are simultaneously projected at angle `45^@` with velocities `2 ms^-1 and 14 m s^-1`, respectively. Find (a) Minimum separation between them during motion. (b) At what time is the separation between them minimum ? respectively. [...]
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respectively. Find (a) Minimum separation between them during motion. (b) At what time is the separation between them minimum ? ,
Two particles are located on a horizontal plane at a distance `60 m`. At `t = 0` both the particles are simultaneously projected at angle `45^@` with velocities `2 ms^-1 and 14 m s^-1` ,
In the given figure, a = 15 m/s^2 represents the total acceleration of a particle moving in the clock wise direction in a circle of radius R = 2.5 m at a given instant of time. The speed of the particle is:
28
Aug
In the given figure, a = 15 m/s^2 represents the total acceleration of a particle moving in the clock wise direction in a circle of radius R = 2.5 m at a given instant of time. The speed of the particle is: a=15 m/s^2 represents the total acceleration of a particle moving in the clockwise [...]
A gramophone record is revolving with angular velocity omega . A coin is placed at a distance r from the centre of the record. The static coefficient of friction is μ . The coin will revolve with the record if
28
Aug
A gramophone record is revolving with angular velocity omega . A coin is placed at a distance r from the centre of the record. The static coefficient of friction is μ . The coin will revolve with the record if A stone tied to the end of a string of 1 m long is whirled [...]
Two equal and opposite forces F and −F act on a rod of unifrom cross-sectional ara A, as shown in the figure. Find the (i) shearing (ii) longitual stress on the section AB.
28
Aug
Two equal and opposite forces F and −F act on a rod of unifrom cross-sectional ara A, as shown in the figure. Find the (i) shearing (ii) longitual stress on the section AB. as shown in the figure. Find the (i) shearing (ii) longitual stress on the section AB. Two equal and opposite forces F [...]
A,B,C, and D are four trees, located at the vertices of a square (Fig. 5.117). Wind blows from A to B with uniform speed. The ratio of times of flight of a bird from A to B and from B to A is n. At what angle should the bird fly from the direction of wind flow, in order that it starts from A and (a) reaches C, (b) reaches D ?
28
Aug
A,B,C, and D are four trees, located at the vertices of a square (Fig. 5.117). Wind blows from A to B with uniform speed. The ratio of times of flight of a bird from A to B and from B to A is n. At what angle should the bird fly from the direction of [...]
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A helicopter flies horizontally with constant velocity in a direction θ east of north between two points A and B ,
A) ,
and D are four trees ,
at distance d apart. Wind is blowing from south with constant speed u; the speed of helicopter relative to air is nu ,
B ,
C ,
where n > 1. Find the speed of the helicopter along AB. The helicopter returns from B to A with same speed nu relative to air in same wind. Find the total time for the journeys. ,
Two rods A and B. each of equal length but different materials are suspended from a common support as shown in the figure. The roads A and B can support a maximum load of W 1 = 600 N and W 2 = 6000 N, respectively. If their cross-sectional areas are A 1 = 10mm^2 and A 2 = 1000 mm^ 2 , respectively, then identify the stronger material.
28
Aug
Two rods A and B. each of equal length but different materials are suspended from a common support as shown in the figure. The roads A and B can support a maximum load of W 1 = 600 N and W 2 = 6000 N, respectively. If their cross-sectional areas are A 1 [...]
A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolution in 44 seconds, what would be the magnitude and direction of acceleration of the stone?
28
Aug
A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolution in 44 seconds, what would be the magnitude and direction of acceleration of the stone? A stone tied to the end of a string of 1 [...]