A 5 kg trolley is pulled forward by a force of 50 N while friction of 10 N acts against it. What is its acceleration?
Answer and explanation
Correct answer: B. 8 m/s
- Step 1: Net force N.
- Step 2: m/s.
Answer
8 m/s.
Why not the others: 10 m/s: friction is ignored. 12 m/s: friction is added to the pulling force. 40 m/s: the net force is not divided by the mass.
Practise more Calculations.
Free questions with an explanation for every one, and full timed Junior Cycle (Ireland) mock tests.
More Calculations questions
- A 1000 W heater is on for 2 hours. Electricity costs 30 cent per kWh. What is the cost?
- A 3000 W heater is on for 3 hours. Electricity costs 30 cent per kWh. What is the cost?
- A metal object of mass 156 g is lowered into a measuring cylinder containing 300 cm of water. The water level rises to 360 cm. What…
- A 1000 W heater is on for 4 hours. Electricity costs 25 cent per kWh. What is the cost?
- A metal object of mass 195 g is lowered into a measuring cylinder containing 250 cm of water. The water level rises to 275 cm. What…
- How many moles are there in 32 g of methane, CH? (Relative formula mass = 16)