Answer the following questions with step by step explanations

1. A young girl is riding a bicycle that has a total mass (including the kid) of 21.8 kg. The girl is moving at 6.66 m/s on a flat road when she suddenly slams on the brakes and skids to a stop in 6.98 meters.

What was the magnitude of the average force due to friction acting on the bicycle?

Remember, the magnitude of a force is always positive.

Assume a constant friction force measured in Newtons and 3 significant digits in your answer.

2. A young girl is riding a bicycle that has a total mass (including the kid) of 34.1 kg. The girl is moving at 4.98 m/s on a flat road when she suddenly slams on the brakes and skids to a stop in 10.6 meters. How many Joules of work was done on the bike+ girl?

Do not use scientific notion for this problem and round off to 3 significant digits in your answer.

3. A 46.4 kg woman starts from rest at the bottom of a flight of stairs that has a total height of 2.9 meters. She reaches the top of the stairs in5.00seconds. How much power does she generate if she is moving at 2.29 m/s at the top of the stairs? Use g = 9.8 m/s², and only include 3 numbers in your answer.