Science U4.1Forces

Jayden is having an arm wrestling contest with Dalya. Jayden applies 17N of force, Dalya applies 11N. What will happen?

• Jayden's arm will go backwards because the force is unbalanced

• Dalya's arm will go forwards because the force is unbalanced

• Jayden and Dalya will have a balanced force, so there will be no movement.

• Dalya's arm will go backwards because the force is unbalanced.

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a 50 year old man and his 8 year old daughter are skateboarding down a hill. Who will have a harder time stopping and why?

• The 50 year old man, because there is less friction for him.

• The 50 year old man, because he has more mass.

• The 8 year old daughter, because there is more friction for her.

• the 8 year old daughter, because she has less mass.

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Jerry is pushing a bookshelf with 10 Newtons (N) of force to the right. Nate is pushing a bookshelf with 12 Newtons to the left. Which way will the bookshelf move if gravity and the force from the ground are equal?

• Up

• left

• right

• It will not move.

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Why can you ice skate on an ice rink better than you can ice skate on concrete?

• Ice has more friction, so you can move faster.

• Ice has less friction, so you can move faster.

• Ice is effected less by gravity.

• Ice is effected more by gravity.

What force moves an object away from the force itself?

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What force moves an object towards the force itself?

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Gravity is what kind of force?

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A rollercoaster designer wants to increase the speed of the big drop that starts her rollercoaster. What can she do? (Choose two)

• decrease the angle of the drop.

• increase the amount of friction the drop has.

• increase the amount of force applied to the cart

• decrease the height of the drop

• increase the height of the drop

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A flying squirrel doesn't really "fly," it actually glides. What is the force that eventually brings it back down to Earth?

Which is an example of an object overcoming, or temporarily defying gravity?

• a basketball bouncing off of the court

• a bowling ball gliding down the lane

• a golf ball being putted into the hole

• a football laying on the ground

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