Trincomalee Campus, Eastern University of Srilanka
Department of Physical Science, Faculty of Applied Science
Year I Semester I- 2018/2019
General Physics I
Continuous Assessment I
1) Write down the most useful three fundamental equations that describe the motion of an object moving with constant acceleration along one dimensional.
2) A rocket moves straight upward, starting from rest with an acceleration of 30 m/s2 . It runs out of fuel at the end of 4.00 s and continues to coast upward, reaching a maximum height before falling back to Earth.
(i) Find the rocket’s velocity and position at the end of 4.00 s.
(ii) find the maximum height the rocket reaches and
(iii) find the velocity the instant before the rocket crashes on the ground.
3) A student stands at the edge of a building and throws a stone horizontally over the edge with a speed of 18.0 m/s. The building is 50.0 m above a flat, horizontal beach as shown in following Figure
i. Find the x- and y-components of the initial velocity;
ii. Write the equations for the x- and y-components of the velocity of the stone with time;
iii. How long after being released does the stone strike the beach below the cliff?;
iv. With what speed and angle of impact does the stone land?.
4) If a stone is thrown upward from the top of the building at an angle of 30° to the horizontal with the initial velocity of 20 m/s Find:
i. the velocity of stone at impact;
ii. the horizontal range of the stone;
iii. time taken for the stone to hit the ground
No comments:
Post a Comment