Answer: Yes it possible for a system to have negative potential energy, since the choice of the zero of potential energy is arbitrary.
Explanation:
Potential energy is defined as the energy present in an object due to its position.
Mathematically, P.E = mgh
A potential energy can be negative also. This is because zero potential energy is arbitrary. For example, at the top of a building the choice of potential energy can be zero.
Therefore, the potential energy below the building will be negative.
Ores are specifically defined as a type of rock wherein it contains essential. These minerals would then be extracted from the rock and would be used in various industries. One conventional way of overcoming the disadvantages of using ones is through the use of recycled aluminium products.
The distance travelled by the ball is 43.2 m
Explanation:
The motion of the ball is a projectile motion, which consists of two independent motions:
- A uniform motion (constant velocity) along the horizontal direction
- A uniformly accelerated motion, with constant acceleration (acceleration of gravity) in the downward direction
Here, we want to find the (horizontal) distance travelled by the ball before hitting the ground. Therefore, we can just consider the horizontal motion of the ball.
Since it is a uniform motion, we can write:

where
v = 13.5 m/s is the horizontal speed
t = 3.2 s is the time of flight
Solving for d, we find

Learn more about projectile motion:
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Answer:
The horizontal distance traveled by the rocket is 90.46 m
Explanation:
Given;
initial velocity of the rocket, u = 30 m/s
angle of projection, θ = 40°
the horizontal distance traveled by the rocket = ?
The horizontal distance traveled by the rocket is given by the range of the projectile.
The range of the projectile is given as;

Therefore, the horizontal distance traveled by the rocket is 90.46 m
The closest answer in the given options is 90.54 m
The answer is c. It starts in the past by saying he "bought" then shifts to present by saying "goes" and "buys" but then shifts back to past by saying "last week"
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