Grade 12Mechanics

Please explain with reasons..
Please explain with reasons..Please explain with reasons..vvvvvvPlease explain with reasons..Please explain with reasons..Please explain with reasons..

Question image for Please explain with reasons.. Please explain with

kavishka

6 Years agoGrade 12

2 Answers

Arun

6 Years ago

Dear student

dimensions of F/t = dimension of Av^2 = dimension of Bt

[MLT^-2] /[T] = A [L^2 T^-2] = B [T]

A = [ML^-1 T^-1]

B = [MLT^-4]

Hope it helps

Vikas TU

6 Years ago

Dear student

Please follow this for better understanding

Since, the force is on the left hand side, therefore the right hand side quantities also represent force. Thus, both at and bt² represent force.

Dimensional formula of force - M L T^(-2)

Dimensional formula of at and bt² will also be M L T^(-2)

Means, [aT] = MLT^(-2)

= [a] = (M1 L1 T-²)/T

= [a] = M1 L1 T-³

Similarly for B,

force = Bt²

so b= force/t2

= MLT^-4

Hope this clear

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

Please explain with reasons..Please explain with reasons..Please explain with reasons..vvvvvvPlease explain with reasons..Please explain with reasons..Please explain with reasons..

kavishka

2 Answers

Arun

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

Please explain with reasons..
Please explain with reasons..Please explain with reasons..vvvvvvPlease explain with reasons..Please explain with reasons..Please explain with reasons..

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