Answer:
29.4m/s
Explanation:
Given parameters:
Time = 3s
Unknown:
Average velocity = ?
Solution:
To solve this problem, we use the expression below:
v = u + gt
v is the average velocity
u is the initial velocity = 0m/s
g is the acceleration due to gravity = 9.8m/s²
t is the time
So;
v = 0 + (9.8 x 3) = 29.4m/s
Answer:
Explanation:
Speed of an object is defined as the ratio of the distance covered by the object to the time taken to cover that distance.
Let be the speed of the object.
Let be the distance travelled by the object.
Let be the time taken by the object.
So,
s=
So,the speed of the car is
Scientists<span> use the </span>scientific method<span> to make testable explanations and predictions about the world. A </span>scientist<span> asks a question and develops an experiment, or set of experiments, to answer that question.
</span><span>Ask a QuestionDo Background ResearchConstruct a HypothesisTest Your Hypothesis by Doing an ExperimentAnalyze Your Data and Draw a ConclusionCommunicate Your Results</span>
Answer:
V₂ = 800 Volts (rms)
Explanation:
The turns ratio of an ideal transformer is given by the following formula:
N₁/N₂ = V₁/V₂
where,
N₁ = No. of turns in primary coil of the transformer = 1000 N
N₂ = No. of turns in secondary coil of the transformer = 8000 N
V₁ = rms Voltage on primary side of the transformer = 100 V
V₂ = rms Voltage on secondary side of the transformer = ?
Therefore, using these values in equation, we get:
1000 N/8000 N = 100 V/V₂
V₂ = (100)(8) Volts
<u>V₂ = 800 Volts (rms)</u>
<h2>Answer: A lever
</h2>
The catapult is basically a type of simple lever or first class lever, which is a device used to transmit force and displacement to an object, by means of the amplification of the applied mechanical force, thus increasing its speed or distance traveled.
These simple levers are composed of a rigid bar that can rotate freely around a <u>point of support</u> (the fulcrum). However what differentiates them from the other levers is that the <u>fulcrum</u> is between the point where the <u>effort</u> must be applied and the point where the <u>resistance</u> is.
With this configuration it is posssible to make several arrangements, depending on the purpose to be achieved, either control and decrease the speed and distance traveled by the object or increase it.