In which of the following cases does the force do no work?
Correct answer: A. Carrying a box to a different room
- A. Carrying a box to a different room
- B. Pushing a box
- C. Pulling a box using a string
- D. Lifting a box from the ground
Explanation
Work is defined as the component of the force parallel to the displacement multiplied by the magnitude of the displacement. In the scenario of carrying a box horizontally across a room, the force exerted is vertical, while the displacement is horizontal. Since there is no force component in the direction of displacement, no work is done in this case. Conversely, in the other scenarios (lifting, pushing, and pulling), the force applied has a component in the direction of displacement, resulting in work being done.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
Practise Scientific Reasoning
334 free Scientific Reasoning MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 27 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Scientific Reasoning questions
Why does our hair get messy after we pull off a cap/hat?
Why does the hair on our arms get raised when it is brought near a television screen?
Order the following steps to separate a mixture of sodium chloride, sand and iron.I- Mix in waterII- EvaporateIII- hold a magnet bar above the mixture/solutionIV- Filter and dry filtrate
In which of the following is work being done?
In which case is no work being done?
The figure shows Sara (left) weighing 50kg and Afsana (right) weighing 40 kg using a seesaw together. The seesaw is 2m long. How much farther should Afsana and Sara be from the edge of the seesaw on their respective sides for the beam to be balanced?