CHONG BOON SECONDARY SCHOOL
PHYSICS WORKSHEET
NAME: _____________________( )
CLASS: 4N___
DATE: _______
1.
Write down the relation between force, mass and acceleration. State the SI unit for each quantity.
2.
How much work is done in lifting a bag of 20N through a vertical distance of 1.5m? Write down the
formula you would use to find its work done and state the SI unit.
3.
A metal of 4kg is dropped a distance 0.8m onto a horizontal surface to test its hardness. How much
gravitational potential energy has been transformed? Write down the formula you would use to find
the energy and state its SI unit.
4.
Write down the formula for Snell's law.
5.
State the SI unit for each quantity for potential difference, V, current, I and resistance, R.
6.
What formula would you used to find the combined resistance, R for resistors R1, R2 and R3 that are
connected in
series in a circuit
parallel in a circuit
a)
b)
7.
If V is the potential difference, I is the current, R is the resistance and t is the time taken, write
down the formula for the electrical energy released E in terms of
a)
V, I and t : _________________
b)
I, R and t : _________________
c)
V, R and t : _________________
8.
Write down three formulae for the electrical power released P in terms of V, I and R.
9.
What is the reading on the scale of the micrometer screwgauge shown below?
10.
A stone which has a mass of 12g and a volume of 4cm3 is gently lowered into 25 cm3 of water in
a measuring cylinder. What will be the new reading on the measuring cylinder?
prepared by Ms Agnes Ho
5/5/03
1
11.
The diagram shows a uniform bar of 8 m. Calculate the force F required to balance the bar as
shown.
12.
A shiny metal rod and a wooden rod of equal length and diameter are touched at room
temperature. Explain why the metal rod feels colder than the wooden rod.
13.
A lift accelerates from rest to a speed of 15 m/s in 5 s. It then moves with a constant velocity for
20 s, before coming to rest at the top of a tower in 6 s.
a)
b)
c)
d)
Draw a graph to show the motion of the lift.
Calculate its acceleration.
What is it deceleration before coming to rest.
Find the total distance travelled by the lift to the top of the tower.
prepared by Ms Agnes Ho
5/5/03
2