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A motorist is travelling at 90 kmph, when he observes a traffic signal 250 m ahead of him turns red. The traffic signal is timed to stay red for 12 secs.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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A particle is projected from the top of a tower of height 50m with a velocity of 20m/sec at an angle 30 degrees to the horizontal. Determine:
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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Fig. Shows the v-t diagram for the motion of train as it moves from station A to station B. Draw a-t graph & find the average speed of the train & the distance between the stations.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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For crank of concentric mechanism shown in fig. determine the instantaneous centre of rotation of connecting rod at position shown.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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The y coordinate of a particle is given by $y = 6t^3 -5t.$ If $a_x = 14t m/sec^2 \&\space v_x = 4m/sec$ at $ t = 0,$ determine the velocity & acceleration of particle when t=1 second.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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With what minimum horizontal velocity (u) can a boy throw a rock at A & have it just clear the obstruction at B? Refer fig.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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In a crank and connecting rod mechanism, the length of crank and the connecting rod are 300 mm and 1200 mm respectively.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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At the position shown in figure, the crank AB has Angular velocity of 3 rad/sec clockwise. Find thevelocity of slider C and the point D at the instant shown. AB = 100 mm.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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Collar B moves up with constant velocity $V_B=2 m/s$ . Rod AB is pinned at B. Find out angular velocity of AB and velocity of A.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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Explain instantaneous centre of rotation.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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'C' is a uniform cylinder to which a rod 'AB' is pinned at 'A' and the other end of the rod 'B' is moving along a vertical wall as shown in fig.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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In a fig. Collar C slides on a horizontal rod. In the position shown rod AB is horizontal & has angular velocity of 0.6 rad/sec clockwise.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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In the mechanism shown the angular velocity of link AB is 5 rad/sec. anticlockwise. At the instant shown, determine angular velocity of link BC & velocity of piston C.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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Due to slipping, points A & B on the rim of disk have the velocities as shown in fig. Determine the velocities of the centre point C & point D on rim at this instant.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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A wheel is rolling along a straight path without slipping. Determine velocity of points A, B and P. $OP = 600 mm, \omega = 4 rad/sec, V_0=4m/s $
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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If a ball is thrown vertically down with a velocity of 10m/s from a height of 3m. Find the maximum height it can reach after hitting the floor, if the coefficient of restitution is 0.7
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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A particle of mass 1kg is acted upon by force F which varies as shown in figure. If initial velocity is 10m/s. Determine:
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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A body of mass 25 kg resting on a horizontal table is connected by string passing over a smooth pulley at the edge of the table to another body of mass 3.75 kg & hanging vertically as shown.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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A two-step pulley supports two weights A=40N & B=60N as shown. Find the downward acceleration of A if radius of bigger pulley is double that of the smaller one. Neglect friction & inertia of pulley.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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Define the terms with neat sketches: Direct impact, oblique impact & line of impact.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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Two masses of 60 N & 30N are positioned over frictionless & massless pulley (fig.) If the 60 N. mass is released from rest, find the speed at which the 60N mass will hit the ground.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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A motorist travelling at a speed of 90 kmph suddenly applies the brakes & comes to rest after skidding 100m.
engineering mechanics updated 2.8 years ago by pedsangini276 • 4.8k
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Define moment of inertia. Write its unit.
engineering mechanics updated 2.9 years ago by teamques10 ★ 68k
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Explain instantaneous centre of rotation.
engineering mechanics updated 2.9 years ago by pedsangini276 • 4.8k
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A circular cylinder of mass 4Kg and radius 15cm is connected by spring of stiffness 4000N/m as shown in fig. Its free to roll on horizontal rough surface without slipping, determine natural frequency.
engineering mechanics updated 2.9 years ago by Krishna_Agrawal • 2.7k
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