Physics Quiz for First Year Students

In what type of a motion the instantaneous velocity and average velocity are the same, and instantaneous acceleration and average acceleration are the same?

A particle moves along the X-axis in such a way that its distance as a function of time is given by X(t)=t2-12t+6. Where X- is displacement in meter and t-is time in second. Determine a) the average velocity b/n t=0sec and t=2sec b) the velocity of a particle at t=3 second c) the average acceleration b/n t=0 sec, and t=2 sec. d) the acceleration of the particle a t =3 second e) by comparing your result on part C and D, what do you say about the motion of the particle?

An aero plane taxis onto the runway going at 10m/s. If it can accelerate steadily at 3.0m/s2.and its take-off speed is 90m/s, what length of runway will it need?

A Speedy tortoise can run with a velocity of 10cm/s, and a hare can run at 2m/s. In a race they both start at the same time, but the hare stops for 2min. The tortoise wins by its neck. What is the length of the race?

A projectile is fired in such a way that its horizontal range is equal to four times its maximum height. What is the angle of projection?

Discuss the following a) the three keplers' Law of planetary motion b) kinetic and static friction c) Weightlessness

When an object is immersed in a liquid at rest, why is the net force on the object in the horizontal direction equal to zero?

Explain strain, stress and elastic modulus.

If the shear stress in steel exceeds 4x108N/m2, the steel ruptures, determine the shearing force necessary to, a) shear steel bolt 1cm in diameter and b) punch a 1cm diameter hole in a steel plate 0.5cm thick.

A 200kg load is hung on a wire having length 4m, cross-sectional area of 0.2x10-4m2 and the Young's Modulus 8x1010N/m2 .What is its increase in length?