89 Answered Questions for the topic Mechanics

Mechanics

10/09/16

PLEASE HELP ME SOLVE THIS QUESTION.
P is a point 10m from the bottom of a slope, A ball is rolled up the slope from P with as initial velocity of 8 m.s-1 , it undergoes a constant acceleration of -4 m.s-2   a-  i- How long does it... more
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Mechanics

08/17/16

Mechanics question help please
There is a fixed wedge whose smooth sloping face is inclined at 30 degree to the horizontal. A particle P of mass 2 kg rests on the sloping face of the wedge. A light inextensible string, passes... more
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Mechanics

08/17/16

Mechanics question please help
A car whose engine can work at a maximum rate of 20 kW is traveling along a straight horizontal road. The maximum speed of the car is 40 m/s. Find the resistance to motion. The car, which is of... more
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Mechanics

08/06/16

Mechanics question
A heavy ring of mass 5 kg is threaded on a fixed rough horizontal rod. The coefficient of friction between the ring and the rod is 0.5. A light string is attached to the ring and is pulled... more
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Mechanics

08/06/16

Mechanics question please help
(A) Two particles P and Q of masses 10 kg and 5 kg respectively are attached to the ends of a light in-extensible string. The string passes a fixed smooth peg. ( It's something like two particles... more
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Mechanics

08/03/16

plz help me out in this mechanics question
three  solid hemispheres of radii r each, are placed in contact with each other with their flat faces on a rough horizontal surface. a sphere of mass m and radius r is placed symetrically on top of... more
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Mechanics

07/09/16

Mechanics question please help
A particle Y of mass 2m connected to a fixed point X by a light inextensible string. It is also connected to a particle Z of mass m by a light inextensible string which passes over a light pulley... more
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Mechanics

07/09/16

Mechanics question please help
A particle of mass m suspended from a fixed point A by a light inextensible string which passes through a small light ring R. The ring is attached to a fixed point B, at the same horizontal level... more
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Mechanics Physics Projectile

04/23/16

projectile, force of cannon
1. Assume that every projectile fired by a toy cannon experiences a constant net force F along the entire length of the barrel. If a projectile of mass m leaves the barrel of the cannon with a... more
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Mechanics Physics Velocity

01/29/13

A train, a late passenger, and related velocities - Please help ASAP
A train pulls away from a station with a constant acceleration of 0.37 m/s2. A passenger arrives at a point next to the track 6.1 s after the end of the train has passed the very same point. What... more
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Mechanics Physics Gravity

01/29/13

Gravity, height, and rock falling problem - Please help ASAP
A rock dropped from a cliff covers one-third of its total distance to the ground in the last second of its fall. Air resistance is negligible. How high is the cliff?
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Mechanics Physics

01/29/13

Physics problem dealing with echolocation and a doppler type effect - Please help ASAP
Bats use echolocation to determine their distance from objects they cannot easily see in the dark. The time between the emission of a high-frequency sound pulse (a click) and the detection of its... more
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01/29/13

An average velocity question dealing with a relay race - Please help ASAP
The cheetah can run as fast as 113 km/h, the falcon can fly as fast as 161 km/h, and the sailfish can swim as fast as 105 km/h. The three of them run a relay with each covering a distance L at... more
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Mechanics

08/27/12

Trying to program an RPM Gauge
I've an RPM Gauge that spins the needle from 0 - 90 degrees, with the needle towards bottom at 0, spinning to the left towards -90, and up towards 180. It has to accurately reflect around 1 to 8000... more
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