Answer:
the 3rd pic is correct
Explanation:
because the arrows are going away from each other.
You do 50 Joule work when you pick up your sled, lifting it 0.5meter upward.
You do no work to carry the sled to your home.
Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement. For a constant force acting in the same direction as the motion, the work is simply equal to the product of the force's magnitude and the distance travelled.
When a force is applied, it is said to have a component that moves the point of application, or it is said to have positive work.
Hence, lifting it 0.5meter upward, you have to work = weight of the sled × distance × cos 0°
= 100 N × 0.5 meter × 1
= 50 Joule.
To carry the sled to your home, you have to work = weight of the sled × distance × cos 90°
= 100 N × 800 m × 0
= 0.
Learn more about work here:
#SPJ5
b. False
* not joining SkillsUSA and joining BPA instead
* not joining FFA and joining BPA instead
* not joining FFA and joining HOSA instead
Answer:
d not joining FRA and joining HOSA INSTEAD
a. How many kilowatts is this? b. If the oven
is used for 2 hours to bake cookies, how
many kilowatt-hours (kWh) are used? c. If
your town charges $0.15/kWh, what is the
cost to use the oven to bake the cookies?