A block of mass 8 kg resting on a rough horizontal table is connected by a light inextensible string which passos ovor a light frictionless pulloy to another block of mass
5 kg, The 5 kg block hangs vertically as shown in tho dlagram bolow.
A 15 N force is applied to the 8 kg block at an angle of 30° to the horizontal, causing
the block to slide to the left.
15 N
30°
8 kg
7
5 kg
The coafficient of kinetic friction between the 8 kg block and the surface of the table is
0,25. Ignore the effects of air friction,
2.1
Draw a freo-body diagram showing ALL the forces acting on the 8 kg block.
2.2
Write down Newton's second law of motion in words,
Calculate the magnitude of the
Wema
23
Normal force acting on the 8 kg block
Tension in the string connecting the two blocks
74
QUESTION 3 (Start on a new page)
31 Write down Newton's law of universal gravitation in words.
An object weighing 140 N on the surface of the earth is moved to a position which is
6,7 x 10 m above the surface of the earth.
Calculate the percentage by which its weight will change
3.2
Please turn over​