103 Water Sports-Mid

Water Sports FOCUS Question How do people move in the water?

People Power Do you like playing in water? Maybe you like to swim or ride in a boat. There are many ways to enjoy water and water sports. Moving in water is different from moving in air. People need a force to move through both. A force is a push or a pull. But it is harder to move through water. They need more force.

Sometimes people use machines to move in water. People use a paddle to make a canoe move. They push the paddle toward the back of the boat. The canoe moves forward. Two people using paddles can make the canoe go faster. Safety! Always wear a life jacket when on a boat!

Wind Power Wind can help people move a sailboat. The wind pushes on the sails. The sailboat moves forward through the water. The wind blows harder. The sailboat moves faster.

People can use wind to ride on a sailboard. The wind pushes the sail. The sailboard moves forward through the water. The sailboard goes fast when the wind blows hard. Hold on!

Motor Power People can use a motorboat to water-ski. A propeller on the motor turns and pushes water away from the boat. The boat moves forward. Skiers hold on tight to a line. The boat pulls them. To stop, they let go of the line. Math Moment Which kind of power can move a boat fastest through the water? SPEED RECORDS OF BOATS Kind of Power That Moved the Boat Speed in Kilometers per Hour (kmph) People 34 Wind 120 Motor 511