Find the area I have no idea how to do this
2 answers:
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Q 16. The energy is 308.7 J.
Q 17. The energy is 896000 J.
Step-by-step explanation:
Q 16. Given,
Mass (m) of the carriage and baby = 1.5 kg
Height (h) = 21 m
To find the energy.
We will find the potential energy as it rests at the top.
Formula
Potential energy = mgh where g be the gravitational force of the earth = 9.8m/s²
So,
Energy = 1.5×9.8×21 J
= 308.7 J.
Hence,
The energy is 308.7 J.
Q 17. Given,
Mass (m) = 1120 kg
Speed (v) = 40 m/s
To find out the energy.
We will find out the kinetic energy as the car is in motion.
Formula
Kinetic energy = mv²
So,
Energy = ×1120×40² J
= 896000 J
Hence,
The energy is 896000 J.
Kayla can make 50 ribbons for the show using 32 feet ribbon
<u>Solution:</u>
Given, Kayla's making ribbons for school spirit day a roll of ribbon is 32 ft long And for each individual ribbon she needs 0.64 ft
We have to find how many ribbons can she make for her old show.
Number of ribbons that can be made is found out by dividing total available ribbon by ribbon length required for single ribbon
Hence, Kayla can make 50 ribbons for the show using 32 feet ribbon.