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Mechanics | Relativity
The speed of a particle changes from √5m/s to 2√5m/s in a time 't' . If the magnitude of change in its velocity is 5m/s the angle between the initial and final velocities of the particle is
Ans:90°
Ans:90°
Mechanics | Relativity
A 20.0-kg uniform plank is supported by the floor at one end by a vertical rope at the other as shown in the figure. A 50.0-kg mass person stands on the plank a distance three-fourths of the length plank from the end on the floor.
a. What is the tension in the rope?
b. What is the magnitude of the force that the floor exerts on the plank?
a. What is the tension in the rope?
b. What is the magnitude of the force that the floor exerts on the plank?
Mechanics | Relativity
[img]https://upload.cc/i1/2020/03/12/It65bk.jpg[/img]
d8 is 4
d8 is 4
Mechanics | Relativity
A turning fork of frequency 340Hz is vibrated just above a cylindrical tube of height 1.2m. If water is slowly poured into the tube, at what maximum height will resonance occur.
[speed of sound in air = 340ms-1]
[speed of sound in air = 340ms-1]
Mechanics | Relativity
A boy of mass 40kg slides down a chute inclined at 30 degrees to the horizontal. If the chute is smooth and the boy starts from rest, with what velocity does he pass a point 5 m from the starting point?
Mechanics | Relativity
A bullet of mass 0.02kg travelling with speed 100m/s comes to rest when it has gone 0.4m into sand. Find the resisting force exerted by the sand
Mechanics | Relativity
long-distance runner plans to participate in a 24-hourracein North Carolina. The route is shown in miles in the figurebelow.
Mechanics | Relativity
A rubber ball is dropped from a height of 1.75 meters and hits the floor. The ball compressed and then reforms to spring upwards from the floor to the height of 1.14 meters. The time from the balls first contact of the floor until it leaves the floor was 7.35 x 10^-2 seconds. Calculate the balls acceleration while in contact with the floor
Mechanics | Relativity
A constant volume gas thermometer records pressure of body as 250mm of Hg at 0°c and 350mm Hg at 100°c. Calculate the temperature when the gas pressure reads 300mm Hg
Mechanics | Relativity
A suture is stretched to 10%. When the stress is released it recovered 35 % of its strain after 5 hr. What is the retardation time in hours. What is the amount of strain recovered (in %) after 6 hrs of its original value.
