B) 1950-1959
Sputnik I was launched on October 4, 1957
The vertical distance as the object was raised is 40 m.
<h3>What is vertical distance?</h3>
This is the distance between two vertical positions in space. Vertical distance can also be called height.
To calculate the vertical distance at which the object was raised, we use the formula below.
Formula:
- P = Fd/t.................... Equation 1
Where:
- P = Power of the motor
- F = Force
- d = vertical distance
- t = time.
Make d the subject of the equation.
- d = Pt/F............. Equation 2
From the question,
Given:
- P = 120 watt
- F = 15 Newton
- t = 5.0 seconds
Substitute these values into equation 2
Hence, the vertical distance as the object was raised is 40 m.
Learn more about vertical distance here: brainly.com/question/4437308
Answer:
The amount of thermal energy needed is 626.6 J
Explanation:
When a certain amount of heat energy Q is supplied to a substance, the temperature of the substance increases according to the equation
where m is the mass of the substance is the specific heat capacity of the substance is the change in temperature
A rock falls from a cliff. 19.6 m is its displacement after 2 seconds
Answer: 19.6 m
<u>Explanation:
</u>
The rock falling from the cliff falls under the effect of gravity. And as it falls, the initial velocity is zero. To calculate the displacement of the rock which fell from the cliff, after 2 seconds, use the equation of motion, as follows,
We know that 2nd equation of motion,
Given that t=2 sec and u=0. Putting the values into the equation, we get,