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abiii7460
17.07.2020 •
Mathematics
A body of 100 g of mass moves with a constant speed of 20 m / s. At a given moment, a force of 50 N is applied to it, which is constantly held perpendicular to the direction of movement.
1).-The radius of the circular path described by the body .
2). The number of turns per second it will make. Help
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Ответ:
1) 0.8 m
2) 3.98 rev/s
Step-by-step explanation:
1) Centripetal force:
F = mv²/r
50 N = (0.1 kg) (20 m/s)² / r
r = 0.8 m
2) Angular velocity:
ω = v/r
ω = (20 m/s) / (0.8 m)
ω = 25 rad/s
f = (25 rad/s) (1 rev / 2π rad)
f = 3.98 rev/s
Ответ:
-2x - 8
Step-by-step explanation:
Combine like terms
-5x - 7x = -2
Therfore you have
-2x - 8