(d) The acceleration of a particle is a constant. At t = Os the velocity of the particle is (10,20)m/s. At t = 4s the velocity is (0, 10)m/s.
(i) What is the particle's acceleration?
(ii) How do the position and velocity vary with time? Assume the particle is
initially at the origin.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?