Browsing as Guest. Answer checking, progress and bookmarks are disabled. Log in to track your work.
Practice — Work and Energy • Work Done by a Force
Work done by force
Difficulty: ★☆☆
401
A crate is pushed 2 m across a smooth horizontal floor by a horizontal force of 30 N . Find the work done by the force.
Log in to check answers and record progress.
Solution:
Work done =Fd=30×2=60 J
Work done by force
Difficulty: ★☆☆
402
A box is pulled 5 m across a smooth horizontal floor by a rope with tension 20 N . Find the work done by the tension when the rope is horizontal
Log in to check answers and record progress.
Solution:
Work done =Fd=20×5=100 J
Question 403
Difficulty: ★☆☆
403
A box is pulled 5 m across a smooth horizontal floor by a rope with tension 20 N . Find the work done by the tension when the rope is at \(40^∘\) above the horizontal. Give your answer in 3 s.f.