Mechanics | Relativity Answers

two particles a and b of masses 10kg and 12kg respectively, are connected by a light inextensible string which passes over a light smooth pulley P. Particle a rests on a smooth horizontal surface and b rests on a smooth plane inclined at 45 degrees to the horizontal with the string taut and perpendicular to the line of intersection of the table and the plane. The system is released from rest. what is the magnitude of the acceleration of the particles?

Consider a woman lifting a 60N. Find the tension in her back muscle and compression in her spine muscle when her back is horizontal. Approximate the situation as shown in (b) and assume this upper part of her body to weigh 250N with the centre of gravity as indicated.

A 30 kg suitcase is being pulled by a strap with a force of 85N at an angle 15° from the floor. If the coefficient of static friction is 0.30, will the suitcase move? Why or why not?

Please help me

Q1. Sections 1 and 2 are at the beginning and end of the bend of the 200 mm diameter pipe in which the quantity of flow is 0.28 m3/s. The angle of deflection of the water is 40. Calculate the force that the liquid exerts on the bend if the pressure in the pipe is 50 kPa. Assume no loss of pressure round the bend.

Q2. A 50 mm diameter stream of water strikes a 0.5 m by 0.5 m square plate which is at an angle of 30 degrees with the stream’s direction. The velocity of the water in the stream is 20 m/s and the jet strikes the door at its centre of gravity. If the plate is hinged at A, by neglecting the friction and self-weight of the plate, determine the normal force P applied at the upper edge of the plate to keep the plate in equilibrium. You may assume that the velocities of the jet remain unchanged after split.

A belt runs on a wheel of radius 30cm. During the time that wheel coasts uniformly to rest from
an initial speed of 2.0revs/s, 25 m of belt length passes over the wheel. Find the deceleration of
the wheel and the number of revolutions it turns while stopping.

A 5.62 g tennis ball is loaded into 1.27 kg homemade canyon the canyon is at rest. When it is ignited, Canyon recoils a distance of 6.1 cm in .0281 seconds. Find the post explosion velocity of the Canyon/tennis ball.

A 0.1m long elastic band extends 5mm when a load of 80N is hung from its end. Calculate the strain on the band

By what percent the energy of satallite has to be increased to shift it from an orbit of radius R to 3/2R
Ans 33.3%

Jack & Joe leave their house at the same tme , drive towards each other.jack drives at60kmp and joe 30kmp.they pass each other in 1min.how far apart were Jack and joe when they started?

a belt runs on a wheel of radius 30cm. during the time that wheel coasts uniformly to rest from an initial speed of 2.0revs/s, 25m of belt length passes over the wheel. find the deceleration of the wheel and the number of revolutions it turns while stopping.