Grade 10 Physics · Strand 1: Mechanics and Thermal Physics · Energy, Work, Power and Machines
Introduction to Machines, Mechanical Advantage and Velocity Ratio
A short Grade 10 Physics lesson for the CBE curriculum, part of Mechanics and Thermal Physics: Energy, Work, Power and Machines. Learn it on any phone with notes and slides, then check yourself with a quick quiz and earn XP. This lesson is free.
Try these questions
5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.
1. A builder in Nakuru uses a lever to lift a crate of roofing sheets weighing 1,200 N by applying an effort of 300 N. Calculate the mechanical advantage of the lever.
Type your answer in the lesson.
2. A pulley system is greased so that its moving parts turn more smoothly. Which statement correctly describes the effect on its mechanical advantage (MA) and velocity ratio (VR)?
- A. MA increases and VR stays the same
- B. MA stays the same and VR increases
- C. Both MA and VR increase
- D. MA decreases and VR stays the same
3. A practical lifting machine has a velocity ratio of 5. Which of these could be its mechanical advantage?
- A. 6
- B. 5
- C. 4.2
- D. 0 N
4. A ramp is 2.0 m long and rises to a height of 0.5 m. Calculate its velocity ratio.
Type your answer in the lesson.
5. In a machine such as a wheelbarrow, what name is given to the force that the user applies to the machine?
Type your answer in the lesson.
More in Energy, Work, Power and Machines
Ready for Introduction to Machines, Mechanical Advantage and Velocity Ratio?
Create a free account to open the lesson, take the quiz and track your progress.