Yes your employer can have you leave early to keep your hours at 40.
Depends
Overtime = Hours Worked - Contracted Hours.
No. He can not force you to work.
No limit on hours, just overtime on hours over 40 in one work week. If you do not have a contract with your employer limiting the hours, you can be forced to work the hours. This is one of the benefits of belonging to a union, your work hours have been negotiated with your employer, so they can not force you to work extra long hours.
No, because there bodys arent strong enough or has the sttrenght to work longer than sixteen hours unless its a desk job.
If the average number of hours is 40 hours, then you should be paid at over time rate for the excess for the 20 hours that is above contracted time. IE 40 - 60 = 20
It depends on the terms of your contract
Generally, an employer can dictate work hours. I'm not sure what you mean by "because of open availability" but I don't think that would change the answer.
7
If you work 40 hours a week, your done! You dont have to work anymore hours if you dont want to. It is against the law for any employer to force their employees to work if they dont want to. Call the labor board if you feel your rights have been violated. As for hours, you can work all the hours you want as long as its approved with your employer.
The answer depends on how many hours you are contracted for.