Science

While Robert was helping his father in the garden he pushed a shovel into the ground to dig a hole in the dirt. He picked up the shrub carried it to the hole and held it while he lowered it into the hole. During which of this process does Robert not do work?

• He pushed a shovel into the ground to dig a holes

• He picked up a shrub

• He carried it to the hole

• All of the above

• None of the above

Marcus is hanging a porch swing on his front porch. The first thing he has to do is attach two springs to the ceiling. Then he fastens the swing to the springs so they can stretch and support the weight of the swing. Which 2 types of potential energy do the springs have?

• Elastic

• Gravitational

• Kinetic

• Stretched

• None of the Above

Chloe is training for her first half marathon which requires her to run 21.1 km Before she runs she carefully chooses the foods that will give her the energy for the race she stands still at the starting line then she starts running her body warming up as shes runs. Which energy transformation does not take place in this example

• Chemical energy to Kinetic energy

• Chemical energy to thermal energy

• mechanical energy to chemical energy

• potential energy to kinetic energy

• None of the above

In order for work to be done what must be true about the force exerted on the object and motion of the object

• same direction

• different direction

• opposite direction

• Morgans direction

In order for motion to occur a __________ must be applied on the object.

• force

• energy

• motion

• morgan

• fission

Without ___________ you would not be able to apply force on an object

• force

• energy

• motion

• morgan

• fission

Unless there is __________________ when a force is applied to an object no work has been done

• force

• energy

• motion

• morgan

• fission

What two factors affect how much work is done in any given action

• The amount of force exerted on an object

• the distance the object moves

• cool stuff

• work = force x distance

• None of the above

What is the mathematical formula for finding work

• a + b = c + d = nothing

• work + work + work = boring

• work = force x distance

• None of the above

What are two ways power can be increased

• Same amount of work in less time

• more work in the same amount of time

• More work in less time

• same amount of work in the same amount of time