# Questions on Forces

Q7. The drawing shows a snow-buggy being pulled by a sail. The buggy rests on three skis on the snow.

(a) The drawing above shows four forces that act when the snow-buggy is moving.

Draw a line from each force in the list below to the correct letter from the diagram. Draw only three lines.

3 marks

(b) A scientist travelled 80 kilometres each day in the buggy. How many kilometres did he travel in 10 days?

1 mark

(c) The buggy carried the scientist, food and equipment for the journey. The table shows how the total mass changed.

 total mass at start of journey (kg) total mass at end of journey (kg) mass of buggy, scientist, food and equipment 295 130

The buggy sank deeper into the snow at the start of the journey than at the end. Why did it sink deeper at the start? Use the table to help you.

1 mark

(d) The buggy rests on three skis instead of three wheels. Why are skis better than wheels for travelling on snow?

2 marks

(e) When a bigger sail is used, the buggy goes faster. How does a bigger sail help the buggy to go faster?

2 marks

Maximum 9 marks