General Physics (PHYS2226)
Geology, Mining and Environmental Science - GENV
Semester: Second Semester
Level: 200
Year: 2013
The University of Bamenda
Faculty of Science
Department of Physics
Continuous Assessment of PHYS2226: General Physics
Second semester 2013
Time: 2.h 30
Exercise 1: 6 mks
The components of velocity of a particle moving in the xy plane as a function of time are
given by:
4
2 3
/
Calculate the magnitude of the position, velocity and acceleration of the particle at time 1s, if
the coordinate of initial position is given by (1, -1)
Exercise 2: 7 mks
A boy standing on the first floor of a building throws a hall vertically upwards such that it
drops to the ground. If the ball leaves the boy’s hand at 10m/s and g=10m/
find,
1. The position and velocity of .the ball after 1s, 2s .and 3s.
2. The maximum height and the time it takes to reach it
3. The velocity when the ball is 3 m above the boy’s hand
Exercisc3: 7mks
The .motion of a particle along a straight path is described by the function, 6+5
-
.
1. Find the position, velocity and acceleration at time t= 1s
2. During what interval of time is the velocity positive and what is the maximum Velocity?
3. During what interval of time is x positive?
Exercise 4: 10 mks
A projectile is fired from the edge of a 150m cliff with an initial velocity of 150m/s at an
angle of 30
0
with the horizontal. Neglecting air resistance and taking g= 10m/
,
1. Sketch the diagram below showing range «and maximum height above the horizontal line
the projectile reaches,
2. Write the components of projectile anywhere on its trajectory.
3. Calculate range, and maximum height above the horizontal line.
4. Calculate the greatest elevation above the ground reached by the projectile
5. The magnitude of the resultant velocity of the stone just before it strikes the ground
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