Work (Leaving Cert Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What two conditions must be met for work to be done in physics?
What two conditions must be met for work to be done in physics?
Force applied and movement in force direction
What is the formula for calculating work done?
What is the formula for calculating work done?
What is the SI unit of work?
What is the SI unit of work?
Joule
Is work a scalar or vector quantity?
Is work a scalar or vector quantity?
Scalar - has magnitude but no direction
If a force acts perpendicular to displacement, how much work is done by that force?
If a force acts perpendicular to displacement, how much work is done by that force?
Zero work is done
You push against a brick wall all day but it doesn't move. How much work have you done?
You push against a brick wall all day but it doesn't move. How much work have you done?
No work - there's no displacement
Who was the joule named after?
Who was the joule named after?
James Prescott Joule
What work is done lifting a 5 kg object through 10 m at steady speed? (Use m s)
What work is done lifting a 5 kg object through 10 m at steady speed? (Use m s)
490 J
Does the work done depend on how fast the movement occurs?
Does the work done depend on how fast the movement occurs?
No - work is independent of speed
A horse pulls a cart with 400 N force through 20 m. What work is done?
A horse pulls a cart with 400 N force through 20 m. What work is done?
8000 J
What does 1 joule equal in terms of newtons and metres?
What does 1 joule equal in terms of newtons and metres?
1 N m
For work calculation, what displacement matters when climbing stairs?
For work calculation, what displacement matters when climbing stairs?
Vertical height only