Grade 9Mechanics

A bodt of mass m is launched up on a rough inclined plane making an angle 45 with horizontal . if the time of ascent is half of the time of desent ,the frictional coefficient between plane and body is

uday surya

6 Years agoGrade 9

1 Answer

Vikas TU

6 Years ago

Hiii

Time taken to cover upward = Tu

Time taken to cover downward = Td

Td = 2Tu

We know that

S = VoTu - ½ aTu^2 (Upward Motion)

S= ½ a Td^2

solving this , you will get

Upper acceleration = 4 * below acceleration

Using Newons second law of motion

ma_u = mgsinQ + mew*mgcosQ

ma_d = mgsinQ – mew*mgcosQ

putting the value and solving you will get

mew = 3/5

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

mechanics

1 Answer Available

Last Activity: 10 Months ago

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11
21
31
41

mechanics

1 Answer Available

Last Activity: 10 Months ago

A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mm
at the free end, where a small mass of 2 g is positioned. determine
(i) The velocity of the end when passing through the zero position
(ii) The acceleration at maximum displacement
(iii) The maximum kinetic energy of the mass

mechanics

2 Answers Available

Last Activity: 3 Years ago

An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of spring
constant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by the
damping constant b = 0.07kg/s.
(i) Find the period of the damped oscillation.
(ii) By what percentage does the amplitude of the oscillation decrease in each cycle?

mechanics

1 Answer Available

Last Activity: 3 Years ago

If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

mechanics

1 Answer Available

Last Activity: 3 Years ago

View all Questions

A bodt of mass m is launched up on a rough inclined plane making an angle 45 with horizontal . if the time of ascent is half of the time of desent ,the frictional coefficient between plane and body is

uday surya

1 Answer

Vikas TU

Other Related Questions on mechanics

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.11213141

If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11
21
31
41