A stone is dropped from rest and falls for 2.0 s. Ignoring air resistance, how far does it fall? ( m/s²)
Answer and explanation
Correct answer: D. 20 m
- Step 1: .
- Step 2: m.
Answer
20 m.
Why not the others: 9.8 m: the time was not squared. 39 m: the factor of one half was missed. 4.9 m: only one second was used.
Practise more Electricity and Further Mechanics.
Free questions with an explanation for every one, and full timed Scottish Highers mock tests.
More Electricity and Further Mechanics questions
- A cell of EMF 6.0 V and internal resistance 0.50 Ω supplies a current of 2.0 A. What is the terminal potential difference?
- A battery has EMF 12 V. When it supplies 3.0 A the terminal p.d. is 10.5 V. What is the internal resistance?
- A 470 µF capacitor is charged to 12 V. How much charge is stored?
- How much energy is stored in a 470 µF capacitor charged to 12 V?
- The mains supply has an r.m.s. voltage of 230 V. What is the peak voltage?
- Which type of semiconductor is made by doping silicon with phosphorus, which has five outer electrons?