At rest, when travelling at a constant speed, and when in mechanical equilibrium, there is no acceleration and answer choice D is correct.
<h3>How would you define acceleration?</h3>
In mechanics, acceleration describes the rate at which a driving object's velocity changes over time. They are accelerations and vector quantities. The direction of an object's acceleration is determined by the direction of the net force acting on it. Depending on whether an object is moving faster, slower, or in a different direction, its velocity may change. Examples of acceleration include a falling apple, the moon orbiting the earth, and a car that has stopped at a stop sign. The car is positively accelerating if the speed is increasing. As the car slows down, its speed decreases. A decline in speed is referred to as negative acceleration. In both situations, the car is traveling ahead, yet one has a positive acceleration and the other a negative one.
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This property is called "Opacity".
The question is worded in a difficult way. A more easily understood wording of this question would be:
"<em>What is the name of the property of a material that prevents light passing through?"</em>
Answer:
The mass of the receiver is 68.862 kg
Explanation:
Given;
let mass of the receiver be "m₁"
initial velocity of the receiver, u₁ = 0
mass of the tackler, m₂ = 156 kg
initial velocity of the tackler, u₂ = 6.89 m/s
their final velocity, v = 4.78 m/s
Apply the principle of conservation of linear momentum, for inelastic collision;
m₁u₁ + m₂u₂ = v(m₁ + m₂)
(m₁ x 0) + (156 x 6.89) = 4.78(m₁ + 156)
0 + 1074.84 = 4.78 (m₁ + 156)
1074.84 = 4.78 (m₁ + 156)
m₁ + 156 = 1074.84 / 4.78
m₁ + 156 = 224.862
m₁ = 224.862 - 156
m₁ = 68.862 kg
Therefore, the mass of the receiver is 68.862 kg
Answer: 62.25
Explanation: F = ma
F = 7.5 * 8.3
F = 62.25
Thus, the answer is 62.25 Newtons.
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An example of a a predator in the Ethiopian Highlands ecosystem is the
Wolf.The wolf is a carnivore which acts as a predator to other smaller
animals in the ecosystem.
<h3>What is a Prey?</h3>
Preys are mostly smaller animals in which the predators feed on for food.
They are usually herbivores and primary consumers in the ecosystem.
Examples of Preys include:
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