ACTIVITIES:
1.- To be able to adjust to different slopes and speeds may bicycles have multiple gears.
a) How many different combinations can be used (teeth). (Cassett/Chainring) (pinón/plato).
Chainring\Cassett_____ XL - L - M - S.
Larger_____________:
Smaller____________:
b) If the rider goes to 5rpm with the pedals..what speed takes the biky.
2.- The pulley for a washing machine drum measures 45cm. in diameter and the motor´s pulley is 9cm in diameter. Calculate the gear ratio and the drum´s speed when the motor is turning at 450rpm.
3.- A mechanism is which the drive gear turns at 200rpm and the driven gear turns at 50rpm:
a) What is the gear ratio.
b) Is the drive gear has 20 teeth, how much has the driven gear.
4.- A force of 300N is required to lift a stone.
a) How much force must be applicaed, if you have a lever with the fulcrum situated at 1m of the stone.
1.- To be able to adjust to different slopes and speeds may bicycles have multiple gears.
a) How many different combinations can be used (teeth). (Cassett/Chainring) (pinón/plato).
Chainring\Cassett_____ XL - L - M - S.
Larger_____________:
Smaller____________:
b) If the rider goes to 5rpm with the pedals..what speed takes the biky.
2.- The pulley for a washing machine drum measures 45cm. in diameter and the motor´s pulley is 9cm in diameter. Calculate the gear ratio and the drum´s speed when the motor is turning at 450rpm.
3.- A mechanism is which the drive gear turns at 200rpm and the driven gear turns at 50rpm:
a) What is the gear ratio.
b) Is the drive gear has 20 teeth, how much has the driven gear.
4.- A force of 300N is required to lift a stone.
a) How much force must be applicaed, if you have a lever with the fulcrum situated at 1m of the stone.
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