AI A regulation basketball has a 21 cm diameter and
may be approximated as a thin spherical shell.
How long will it take a basketball starting from
rest to roll without slipping 4.1 m down an incline
that makes an angle of 11.6° with the horizontal?
The acceleration of gravity is 9.81m/s2.
Answer in units of s.
1
kir
thic
2

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?