Forces Investigation Quiz

A student is conducting an investigation on forces. The student rolls a log down a hill. Which surface on the slope of the hill makes the log roll the fastest?

• Smooth grass, because it produces the least friction

• Loose sand, because it produces the least friction

• Rocky ground, because it produces the most friction

• Bushes, because they produce the most friction

1. A student wants to investigate and identify the forces that cause objects to move. The student pushes a book across a shelf until it falls to the floor. Which force caused the book to fall to the floor?

• Gravity

• Magentism

• Friction

• Pulling

Which forces are noncontact forces?

• Friction and gravity

• Gravity and magnetism

• Magnetism and pushing

• Pulling and friction

A student is investigating how much force is needed to slide a box across the floor using a contact force. Which statement describes a contact force?

• A force between objects that attract or repel each other

• A force that slows down an object that is moving

• A force that is applied when objects touch

• A force that speeds up an object that is moving

1. Look at the drawing. A student wants to investigate magnets. Two magnets are placed so the shaded areas are next to each other. The shaded ends are the same poles.

Which best describes what happens if the two magnets are pushed toward
each other?

• 1. The shaded ends of the magnets attract and come together.

• 1. The shaded ends of the magnets repel and move apart.

• 1. The shaded ends of the magnets repel and come together.

• 1. The shaded ends of the magnets attract and move apart.

Look at the picture. Kiesha wants to build a ramp for her dog to safely walk up and down. She plans an investigation to test different ramp materials. Choose the words that complete the sentences. The force between her dog and the ramp is a __________ force. The safest material for the ramp will have the __________ friction between the dog’s paws and the ramp.

• contact; most

• contact; least

• noncontact; most

• noncontact; least

A student is experimenting with different materials to see how they affect the speed of a toy car rolling down a ramp. Which material will make the car roll the slowest?

• Carpet, because it produces the most friction

• Wood, because it produces moderate friction

• Metal, because it produces the least friction

• Plastic, because it produces moderate friction

Look at the picture. Roberta is planning an investigation to see how different surfaces affect how much force she needs to apply to move a heavy box across a room. Which type of surface will make moving the box the easiest?

• Smooth surface

• Rough surface

• Sticky surface

• Wet surface

3. Look at the drawing. A student places three magnets on a stick. The magnets are arranged as shown. 

Choose the words to complete the sentences.

The student explains their observations as follows. Magnets A and B have a noncontact force that causes them to__________. Magnets B and C have a noncontact force that causes them to__________.

• 1. repel; attract

• 1. repel; repel

• 1. attract; repel

• 1. attract; attract