Answer:
3.97305 m
Explanation:
a = Acceleration due to gravity = 9.81 m/s²
If a jump lasts for 1.8 seconds this means that from the moment when the person leaves the ground till the person touches the ground again it takes 1.8 seconds. So, maximum height reached will be at half the time of the jump i.e., 0.9 seconds.
u = Initial velocity = 0
Equation of motion
So, height of the jump is 3.97305 m.
Answer:
The distance is .
Explanation:
Given that,
Time
The velocity is no more than a 14 % error in the speed of light.
So,
Velocity
We need to calculate the distance
Using formula of speed
Where, v = speed
d = distance
t = time
Put the value into the formula
We know that,
The one side distance d' is
Hence, The distance is .
1) Work is the scalar quantity
2) The ideal mechanical advantage of the ramp is 2
Explanation:
1)
In physics, there are two types of quantities:
- Scalar quantity: a scalar quantity is a quantity having only a number and its units. Therefore, it has no direction. Examples of scalar quantities are: distance, speed, energy, mass, temperature...
- Vector quantity: a vector quantity is a quantity having both a magnitude (number+units) and a direction. Examples of vector quantities are: displacement, velocity, force, acceleration...
Let's analyze now the quantities given:
- work : it has only a magnitude, so it is a scalar
- displacement : it has a magnitude and a direction, so it is a vector
- parallel component of force : it has a magnitude and a direction, so it is a vector
- perpendicular component of force: it has a magnitude and a direction, so it is a vector
2)
The ideal mechanical advantage (IMA) of a machine is the mechanical advantage in absence of frictional forces, so when there are no loss of energy.
For a ramp, the IMA is calculated as
where
L is the length of the ramp
h is its height
For the ramp in this problem, we have
L = 6.00 m
h = 3.00 m
Therefore, its ideal mechanical advatnage is
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