Ms. Long and Ms. Mantel are pushing a heavy box across the floor? Why type of force are they creating to move the box?
unbalanced
Bayron is playing with a soccer ball at the top of a hill. He kicks the ball and it rolls down the hill. What force is making the ball roll down?
Gravity
Mike lifted a heavy box. What force did he have to overcome to move the box upward?
Gravity
Explain why a parachute makes a person falling from a great height fall more slowly?
friction and gravity
Sandley started pushing a bookcase across the room.Then, he removed the books and continued pushing with the same force and direction. How does removing the books affect the motion of the bookcase?
The mass is decreased, making the bookcase move faster.
Force that causes a change in motion of the object
Unbalanced Force
Explain why a person standing on the Moon can jump higher than a person standing on Earth.
The Moon's gravitational pull is less than Earth's.
What is a type of force slows or eventually causes an object to stop
Friction
Ms. Long's class and Mrs. Phifer's class are playing tug-of-war. After several minutes, the students notice that the rope has not moved at all. What is one possible cause of this?
a balanced force on the rope.
A toy car rolling along different surfaces will experience different amounts of friction. A toy car would encounter the most friction when rolling on which surface?
A rough surface (for example: a sandy beach, over grass, over rocks)
Yarley kicks the kick ball at recess with more force than she usually does. What will happen to the ball?
More acceleration! It is going to go farther!
an object in motion stays in motion; an object at rest stays at rest
Inertia
What two forces are acting together to keep a cup balanced on a table?
Gravity and the force of the table holding the cup up.
A car and a truck travel at the same speed on a road in the same direction. Both vehicles slow down with the same stopping force. Why does the truck need more distance the the car to stop?
The truck has more mass.