Answer:505.94 N
Explanation:
Given
mass of child (m)=41 kg
N=60 rpm

Radius(r)=1.25 m
and centripetal acceleration is given by 

Answer: In that case, Put something like "My hypothesis is that the car will take (x) seconds to get to checkpoint 1, (x) seconds to get to checkpoint 2, (x) seconds to get to checkpoint 3, and (x) seconds to get to checkpoint 4" Replacing x with random numbers, or number close to the actual found numbers, but honestly as long as the guesses arent outrageous you should get the question right
Explanation:
Which one looks like a screw
A is shoes
B is a fork (lever)
C is a wind chime shaped like a screw
D is a stapler (lever)
By studying meteorites which are the most ancient material in space.