Balanced/Unbalanced Forces from Study Island

Kyle and Jon are both pushing the same box. Kyle is pushing to the right. Jon is pushing to the left.
The box will not move if

• Kyle pushes the box with more force than Jon.

• Jon and Kyle push the box with the same amount of force.

• Kyle stops pushing the box, but Jon does not.

• Jon pushes the box with more force than Kyle.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A ball is rolling down a hill. Which action would slow the ball down?

• rolling another ball down the hill

• adding another force in the same direction

• adding a force in the opposite direction

• decreasing the amount of friction

Tags

NGSS.MS-PS3-5

A worker pushes on a box, but the box is too heavy so it does not move. This is shown in the picture below.
How could the worker make it easier to move the box?

• increase friction between the box and the floor

• place the box on its side so more of it is touching the ground

• place extra weight on top of the box

• place the box on a cart with wheels to decrease friction

Tags

NGSS.MS-ETS1-2

NGSS.MS-PS2-2

Greg and Melissa are playing catch with a football. Greg has just thrown the ball straight toward Melissa. While the ball is in the air, a strong gust of wind blows the ball away from Melissa.

What caused the ball to move away from Melissa?

• the unbalanced force of wind

• the unbalanced force of gravity

• the balanced force of gravity

• the balanced force of wind

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

An unbalanced force is at work when

• a model rocket takes off.

• a glass sits on a table.

• a piece of paper is on the floor.

• a book sits on a shelf.

Tags

NGSS.3-PS2-1

A box is sitting on the floor. Then, two workers start pushing on the box with the same amount of force. This is shown in the picture below. The arrows, in the picture, show the direction of each force.
If the box does not move, what best explains force 1 and force 2?

• Force 1 and force 2 are equal in strength.

• Force 1 is stronger than force 2.

• Force 1 and force 2 are pushing in the same direction.

• Force 1 is weaker than force 2.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Jacob pushed a box of books across the garage floor, and the box moved forward.
When the box stopped moving, Jacob rested for a moment. Then, he put a force on the box a second time. This time, the box moved forward, but faster and farther than the first time.
What kind of force did Jacob put on the box the second time?

• a pull with less force

• a pull with more force

• a push with more force

• a push with less force

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

Annie wants to find out how different amounts of force can affect how fast an object moves. Which of the following is the best scientific investigation Annie could do to find out?

• push objects that have different shapes and measure how far they travel

• measure how much force it takes to move objects with different masses

• survey her classmates to see what they think about this topic

• push the same object with different amounts of force and measure its speed

Tags

NGSS.MS-PS2-2

Andy and his friends are playing baseball. They each hit the ball a different distance, shown in the table below. If each child hit the ball from the same place, who most likely hit the ball with the greatest force?

• Andy

• Jill

• Susan

• Mike

Which of these steps is most likely to be part of an investigation about friction?

• testing which surface is easier to slide a wooden block across

• counting how many paper clips stick to a magnet in a chain

• putting different kinds of batteries in a toy car

• measuring how long it takes one full cup of water to evaporate