akshatmathur

A 2.75kg particle moves as function of time as follows: ×(t)=5cos(1.25t+π/4) Where distance is measured in meter and time in second. (1) what is the amplitude, frequency angular frequency? (2) what is the equation of the velocity of this particle? (3) what is the equation of the acceleration of this particle? (4) what is the spring constant? (5) what are the equation for the potential and kinetic energies of the particle? (6) what is the total energy?

If the mass of an object does not change, a constant net force on the object produces constant?

A man pushes a 9 kg box across a level floor for 20 seconds. The box is initially at rest and has an acceleration of 0.1m/s.

If the coefficient of friction between the box and the floor is 0.5, determine

(a) the amount of work done by the man 

(b) the power output of the man

(g=9.8m/s)

A block of mass m=2.0 kg is attached to a spring of force constant that lies on a horizontal frictionless surface as shown in the figure. The block is pulled to a position x_i = 5.00 cm to the right of the equilibrium and released from rest. Find

(a) the work required to stretch the spring 

(b) the speed the block has as it passes through equilibrium.

A constant force of 8.0 N is exerted for 4.0 s on a 16 kg object initially at rest. The change in speed of this object will be__

What is the powerhouse of the cell?

A 15.0kg box at rest has 250.J of work done on it. How fast is it going?

What is centripetal acceleration 

A body of mass 5 kg initially at rest is subjected to a force of 20 N. The kinetic energy acquired by the body at the end of 10s is__

A body of mass 2.0 kg initially at rest is moved by a horizontal force of 0.5 N on a smooth table. The work done by the force in 8s is__

An object of mass 31 kilograms is on a smooth horizontal plane and a force of

124 Newtons is applied to the object in a horizontal direction (friction is zero).

The object is initially at rest. Calculate

(a) the acceleration of the object 

(b) the velocity of the object after 5 seconds 

(b) the kinetic energy of the object after it moves 14 metres.

An object is moving along the axis so that its distance from the origin at time t is given by:

x= 1/6t^4+13/6t^3-10t^2+t

(a) what is the velocity of the object at time t=6 seconds? 

(b) at what time is the acceleration of the object equal to 4m/s^2 ?

What is the difference between mass and matter?

Explain the difference between "dark matter" and "dark energy". Be Specific!

Determine the magnitude of the centripetal acceleration and force of a car of mass 700 kg going 12m\ s on a circular track with a radius of 50m.

 Explain clearly why molar heat capacity at constant pressure is higher 
than the molar specific heat capacity ta constant volume?

 Explain why latent heat of vaporization is higher than the latent heat of 
fusion.

The loudness of a musical sound is a measure of the sound waves