Rose is riding her bike at 10.0 m/s when she slams on her brakes. She stops in 2.0 seconds. Assume that the total mass is 70.0 kg. Calculate the frictional force required to stop the bike.

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

Ibelieve the answer is b

The magnets are probably damaged or there not strong enough to attached to the refrigerator

You would need to take a picture so i can see