If all the energy she put into bending the bow is completely
transmitted to the arrow, then the arrow has the 100 joules
of kinetic energy when it leaves the bow.
Kinetic energy = (1/2) (mass) (speed)²
100 J = (1/2) (0.5 kg) (speed²)
Divide each side by 0.25 kg: 100 J / 0.25 kg = speed²
[ joule ] = [ newton-meter ] = kg-m²/sec²
100 kg-m²/sec² / 0.25 kg = speed²
400 m²/sec² = speed²
Take the square root of each side: speed = √400 m/s
20 m/s
(about 44.7 mph)
When Adam applies a ‘pull’ force on the pulley, there is an output force that the pulley lets out, directly pulling the object with it. We cannot always pull up objects with our bear hands, no matter how much force we apply. Which is why pulleys allow us to apply the force and pulleys do the work of pulling the objects for us, since work and force come hand in hand.
Answer:
I am explain you in image
Answer:
option D
Explanation:
The correct answer is option D
When verifying Kirchhoff's law we measure current.
Kirchhoff's law deal with current and potential difference.
This law was first described by the German Scientist Gustav Kirchhoff.
Kirchhoff's law stated the current arriving at the node is equal to the current moving out of the node.
Answer:
Fe - Element
Fe2O3 - Compound
Explanation:
From the given chemical formula for two substances, Fe and Fe2O3, Fe is an element while fe2O3 is a compound.
It is so because an element is consist of the same type of atoms while a compund is consist of different atoms under specific proportions. for example: Fe is an element while fe2O3 is a compound.
Hence, the correct answer is:
Fe - Element
Fe2O3 - Compound
