Answer:
25J
Explanation:
Given parameters:
Mass of the watermelon = 2kg
Speed before touching the ground = 5m/s
Unknown:
Kinetic energy = ?
Solution:
To solve this problem, we must understand that kinetic energy is the energy possessed by a body in motion.
K.E = m v²
m is the mass
v is the velocity
Now, insert the parameters and solve;
K.E = x 2 x 5² = 25J
Friction can be defined as a type of force that prevents two smooth surfaces from sliding together on each other. Friction is a strong force that oposses motion when two surfaces come in contact with each other.
The different methods/ways to reduce friction include;
- Application of lubricant to surfaces
- Streamlined bodies; this goes a long way in preventing friction between two bodies.
- Decrease in weight; reducing the amount of weight on a substance can also help to reduce friction
- Applying wheels to objects that move/roll on the ground.
Answer:
Mountains
- When 2 tectonic plates press on each other, the may elevate the land.
An airplane has to elevate to fly
Represented elements not discovered in this time