1. A 0.2-kg ball, attached to the end of a horizontal cord, is revolved in a circle of radius 1 meter and ball’s maximum speed is 10 rpm. What is the magnitude of the sentripetale versnelling and the magnitude of the tension force?
Bekend:
Massa (m) = 0.2 kg
Radius (r) = 1 m
Hoeksnelheid (ω) = 10 rev/min = 10 rev/60 s = 0.17 rev/s = (0.17)(6.28 rad)/s = 1 rad/s
Velocity (v) = r ω = (1 m)(1 rad/s) = 1 m/s
Gesoek: as Dan ΣF
oplossing:
(a) The magnitude of the centripetal acceleration
(b) The magnitude of the tension force
ΣF = ma
T = m as
T = (0.2 kg)(1 m/s2)
T = 0.2 kg m/s2
T = 0.2 N
2. A 1-kg ball at the end of a string is revolving uniformly in a horizontal circle of radius 1 m. The cord will break when the tension in it exceeds 100 N. What is the maximum speed the ball can have?
Bekend:
Massa (m) = 1 kg
Radius (r) = 1 meter
Tension force (T) = sentripetale krag (ΣF) = 100 N
Gesoek: v maximum
oplossing:
[wpdm_package id = '499 ′]
- Massa en gewig
- Normale krag
- Newton se tweede bewegingswet
- Wrywingskrag
- Motion on a horizontal surface without friction force
- The motion of two bodies with the same acceleration on the rough horizontal surface with a friction force
- Motion on an inclined plane without friction force
- Beweging op die growwe skuinsvlak met die wrywingskrag
- Beweging in 'n hysbak
- Die beweging van liggame word deur koorde en katrolle verbind
- Twee liggame met dieselfde versnellinggrootte
- Afronding van 'n plat kurwe – dinamika van sirkelbeweging
- Afronding van 'n gehellde kurwe – dinamika van sirkelbeweging
- Uniforme beweging in 'n horisontale sirkel
- Sentripetale krag in uniforme sirkelbeweging
