C: energy
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A crane lifts a weight of 1000 N through a vertical height of 30 m. It uses 60 000 J of energy. What is the efficienc…
A ball is held at rest on one side of a curved track. The ball is released. It rolls down one side of the track and p…
A lamp connected to a 12V supply converts energy at a rate of 36 W. How much energy will be converted in 10s?
Each row contains a vector and a scalar. In which row is the size of the vector equal to the size of the scalar?
What is the size of the resultant of the two forces shown in the diagram?
A student measures, as accurately as possible, the length and internal diameter of a straight glass tube. The length …