An Object of Mass 4 Kg Starts at Rest from the Top

question 62

Multiple Choice

An object of mass 4 kg starts at rest from the top of a rough inclined plane of height 10 m as shown in Fig. 8-9. If the speed of the object at the bottom of the inclined plane is 10 m/s, how much work is done by the force of friction? Use g = 10 m/s².

• A)-100 J
• B)100 J
• C)0
• D)-200 J
• E)200 J

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Definitions:

Energy of Activation

The minimum quantity of energy that the reacting species must possess in order to undergo a specified chemical reaction.

Equilibrium Reaction

A chemical reaction where the rates of the forward and reverse reactions are equal, leading to a constant concentration of reactants and products.

Molecules

Electrically neutral groups of two or more atoms held together by chemical bonds, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

Toxin

A poisonous substance produced within living cells or organisms that can cause disease when introduced into the body tissues.