Researchers have found that there are some basic things that you can do to become happier.

◆Self

Yourself includes your education, your health, and your sense of purpose. It is important to take care of yourself and to connect the people around you. First, find a hobby. This gives you a chance to meet people with similar interests. You can also volunteer. Volunteering takes the focus off your own problems and makes you feel grateful for what you have.

◆Home

Create a quieter, dark area where you can sit and relax. Paint your living room yellow – it can increase energy and improve mood (情绪). It also helps to own a pet. Pets can make their owners feel calm, and provide love and friendship.

◆Financial (财务的) life

According to Ed Diener, the key to greater well-being is to have money, but not to want it too much. Try to spend money on things that give you long-lasting pleasure. Buy things that will enrich your life, such as music lessons and dinners with friends and family.

◆Social life

Have friends that encourage you to eat right, to be active, to laugh, and to do your best. Meet with your friends regularly and share with them when you have more of something than you need. Support each other in difficult times.

◆Workplace

Your office should be a place that you like. Find a job with people that you enjoy being around. That includes your boss. And do something that you feel strongly about. That is more important than money.

◆Community

If possible, live near people who have about the same amount of money as you. This makes you less aware (意识到的) of what you don’t have. Live in a neighborhood where you feel safe and where you can walk a lot. Walking makes you healthier, and healthier people are happier people.

小题1:What does yourself include according to the passage?

小题2:How can we increase our energy and improve mood?

小题3:What is the key to greater well-being, according to Ed Diener?

小题4:Why should we live near people as rich as ourselves?

小题5:What does the passage mainly talk about?

质量m=2.0kg的物体静止在水平地面的A点上，用水平拉力F₁=10N拉这个物体，使其从A点由静止开始做匀加速直线运动至B点。已知AB间距离为12.5m，物体到B点的速度大小为5.0m/s。g取10m/s²，求：

（1）物体与地面间的动摩擦因数；

（2）当物体运动到B点时，撤去水平拉力F₁，物体在水平面上滑行一段距离后停在C点。现改用与水平方向夹角为斜向上的F₂=10N的力拉这个物体，若使这个物体在水平地面上从C点由静止开始运动，并能到达距C点12.5m远的地方，则F₂至少要做多少功？

（结果保留2位有效数字）