Work, Energy, and Power (Grade 12 NSC Matric Physical Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is net work?
What is net work?
Total work when multiple forces act
What does net work tell us about?
What does net work tell us about?
Overall energy transfer to or from object
How do the two approaches to calculating net work compare?
How do the two approaches to calculating net work compare?
Both give exactly the same answer
In Approach 1, what is the first step?
In Approach 1, what is the first step?
Calculate work by each force separately
In Approach 2, what do you find first?
In Approach 2, what do you find first?
The resultant force
A 300 N force and -100 N friction act over 20 m. What is ?
A 300 N force and -100 N friction act over 20 m. What is ?
J
What does positive work indicate?
What does positive work indicate?
Energy is transferred to the object
How much work do perpendicular forces do?
How much work do perpendicular forces do?
Zero work
Are forces and work both vectors?
Are forces and work both vectors?
No, forces are vectors but work is scalar
Can net work be zero if large forces act?
Can net work be zero if large forces act?
Yes, if positive and negative work cancel