Yes, you can take a backpack on a plane as carry-on luggage as long as it still fits the size and weight restrictions for carry-on baggage.
You can bring a backpack on a plane as a personal item. Most airlines will allow you to carry on the backpack rather then check it in.
Because it is a pack that you carry on your back.
the backpack got sturdy and better to carry, also it can carry more things
No, it is not possible to carry a bridge in a backpack due to the size and weight of a bridge.
Yes. As long as your duffle bag is within the airline's size requirements for carry on luggage, you can use a duffle bag as a carry on item.
To effectively carry a backpack on a bike, use a backpack with chest and waist straps to secure it in place. Pack the backpack evenly to distribute weight, and adjust the straps to ensure a snug fit. Avoid overloading the backpack to maintain balance while riding.
It means, "I carry/bring/take my backpack with the books and the ballpoint pens."
to carry things around
Yes, you can.
You can take a small carry on and a bag you can check. Most of the airlines will charge you for a second bag that you carry on. I was using a small backpack last summer as a carry on and American Airlines wanted to charge me for it. I told them it was my purse and they didn't charge me. My sister had them try to charge her for a small bag she had around her neck to carry money in.
To effectively carry a sleeping bag on your backpack, you can use compression straps or a stuff sack to compact the sleeping bag and attach it securely to the outside of your backpack. This will help save space inside your backpack and keep your sleeping bag easily accessible.
To properly carry a backpack on a bike, wear it with both straps securely on your shoulders and adjust them so the backpack sits high on your back. Make sure the backpack is not too heavy and does not obstruct your movement or vision while riding. Additionally, consider using a backpack with chest and waist straps for added stability.