Intro to Forces

Multiple Choice

Which of the following best describes the role of friction when you kick a soccer ball on grass?

• It helps the ball move faster.

• It slows the ball down by acting in the opposite direction of motion.

• It pulls the ball towards the ground.

• It makes the ball bounce higher.

Multiple Choice

Which of the following is NOT a way to reduce friction as described in the lesson?

• Adding soap to a slip and slide

• Waxing skis or snowboards

• Using oil on moving parts

• Increasing the roughness of a surface

Multiple Select

Which of the following are examples of contact forces?

• Gravity pulling you down to earth

• Pushing your friend on a swing

• Magnet pulling a paper clip

• Pulling the rope during tug-o-war

Open Ended

What are the three main types of friction, and how does each type occur?

Multiple Choice

Why does a person weigh less on the moon than on Earth?

• The moon has less mass than Earth, so it has less gravitational pull.

• The moon is farther from the sun.

• The moon spins faster than Earth.

• The moon has more air resistance.

Multiple Choice

Which of the following is an example of a push force?

• Kicking a soccer ball

• Pulling a wagon

• Gravity acting on an apple

• Holding a book still

Multiple Select

Which of the following are ways that forces can help objects?

• Speed up

• Slow down

• Change shape

• Disappear

Open Ended

How does friction affect the motion of objects, and can you give an example from your own experience where friction played a role?

Multiple Choice

What is the main difference between pushing and pulling an object?

• Pushing moves an object away from the force, while pulling moves it towards the force.

• Pushing and pulling both move objects in the same direction.

• Pushing always requires more force than pulling.

• Pulling only works with heavy objects.

Open Ended

Why is there less gravity on Mars than there is on Earth?