QUESTION 1
An 8 kg block is attached to a 2 kg block by a light
rope as shown below. The 8kg block accelerates
down the rough inclined plane.
QUESTION 2
A 23.4 kg object sits on a frictionless
inclined plane with an angle of 30.0°
from
the horizontal. Draw the diagram, show
and label the forces. What is the value of
(a) weight
(b) normal force, and
(c) parallel force.
QUESTION 3
1.1 Draw a free-body diagram to show ALL the
forces acting on the 2 kg and 8 kg mass
respectively.
1.2 Calculate the weight acting on the 2 kg block.
1.3 Calculate the magnitude of the force which
causes the 8 kg block to slide down the slope.
1.4 If the co-efficient of kinetic friction for the
surface is 0.16, calculate the frictional force
acting on the 8 kg block.
Ball X of mass 3 kg is attached to trolley Y
of mass 4 kg by a light string which passes
over a frictionless pulley as shown in the
diagram. Initially the trolley is at rest on a
slope AB, which makes an angle of 30o
with the horizontal. When the ball is
released it falls to the ground and the trolley
moves up the slope. The coefficient of
kinetic friction along slope AB is µk = 0,2.
QUESTION 4
A block of mass 2 kg is at rest on a rough horizontal
surface. The block is connected with a light
inextensible string, that is hanging over a frictionless
pulley, to another block of mass 1,5 kg. A force of
20 N to the right is applied on the 2 kg block while
the block is experiencing a constant frictional force
of 3,1 N.
3.1 Draw a labelled free body diagram to
show
ALL the forces acting on the
T
trolley as it moves up the slope.
3.2 Show that a friction force of 6,79 N
acts on the trolley as it moves up the slope.
3.3 If the tension (T) in the string is 30 N,
calculate the net force acting on the 4 kg
trolley.
4.1 Draw a labelled free body diagram to show
ALL the forces acting on the 2 kg block.
4.2 Calculate the net force acting on the 2 kg block
if the tension (T) is 17 N.
QUESTION 5
A 5 kg block, resting on a rough horizontal table, is
connected by a light inextensible string passing over
a light frictionless pulley to another block of mass 2
kg. The 2 kg block hangs vertically as shown in the
diagram below.
A force of 60 N is applied to the 5 kg block at an
angle of 10o to the horizontal, causing the block to
accelerate to the left.
The coefficient of kinetic friction between the 5 kg
block and the surface of the table is 0,5. Ignore the
effects of air friction.
5.1 Draw a labelled free-body diagram showing
ALL the forces acting on the 5 kg block.
5.2 Calculate the magnitude of the:
5.2.1 Vertical component of the 60 N force
5.2.2 Horizontal component of the 60 N force
5.3 Calculate the magnitude of the Normal force
acting on the 5 kg block.
QUESTION 6
A block of mass 20 kg is pulled at constant
velocity to the right on a rough horizontal
surface
by a force, F, of magnitude 29 N. F acts at
an angle of 36o to the horizontal as shown
in the
diagram below:
6.1 Draw a labelled free body diagram to
show all the forces that act on the block as
it moves to the right.
6.2 Calculate the magnitude of the
frictional force that acts on the block as it
moves to the
Right.