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A 4.5 kg block is pulled across a table by a horizontal force of 42 N. The frictional force opposing the motion is 7.5 N. Calculate the acceleration of the object.
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A 4.5 kg block is pulled across a table by a horizontal force of 42 N. The frictional force

opposing the motion is 7.5 N. Calculate the acceleration of the object.

User Bradley Mackey
by
5.4k points

1 Answer

4 votes

Answer:

7.67m/s²

Step-by-step explanation:

The net force on the block is;

Net force = Force of pull - Frictional force

mass of block = 4.5kg

force of pull = 42N

Frictional force = 7.5N

Net force = 42 - 7.5

Force = mass x acceleration

ma = 34.5

4.5 x a = 34.5

a =
(34.5)/(4.5) = 7.67m/s²

User JGurtz
by
5.2k points
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