Physics Answers

A spring has a mass, m =2.5 kg and constant, k = 30 N/m. What is the period of this spring?

The displacement of a harmonic oscillator is given by x(t)=9.4 sin (15t), where the unit of x are

meters and t is measures in seconds.

(a) Find the amplitude and the frequency. (b) What is the maximum velocity of the motion?

(c) What is the maximum acceleration?

An electric train moves from rest with a uniform acceleration of 1.5 for the first 10s and continues accelerating at 0.5 for a further 20s. It continues at a constant speed for 90s and finally takes 30s to decelerate uniformly to rest.

Using the equations of motion calculate the total distance travelled

An electric train moves from rest with a uniform acceleration of 1.5 for the first 10s and continues accelerating at 0.5 for a further 20s. It continues at a constant speed for 90s and finally takes 30s to decelerate uniformly to rest.

Using the equations of motion calculate the total distance travelled

Calculate the kinetic energy of a 750 kg car moving at 13.9 m/s

The value of acceleration is different when the bodies are hanging vertically than the acceleration of the bodies that are placed horizontally. Find the value of acceleration in vertically? 

A bucket of water with volume V = 5l is taken out of the well where approximately work of A = 450J is performed. How low (deep) is the water surface of the well?

(For acceleration take g = 10 m / s2)

A body with mass m = 100kg makes uniform rectilinear movements in which case it reaches the kinetic energy of Ek = 20 KJ. How fast was it in that case? V =?

Two bodies are colliding with each other. Assuming that the bodies have initial velocities on the same axis, what are the final velocities of the bodies if the collision is totally inelastic? What are the velocities if the collision is totally elastic?

There are multiple cases but i dont know them depenind on the sense or mass

Determine Ek. of water with volume V = 3m3, if it moves with speed v = 72km / h.