More convenient
More commonly used
98J
Explanation:
Given parameters:
Mass of paint can = 5kg
Height of ladder = 2m
Unknown:
Work done = ?
Potential energy = ?
Solution:
Work done in moving the paint is the force applied under gravity to move it through the give height.
Potential energy is the energy due the position of a body at rest.
For this body:
The work done in moving the paint = Potential energy at the top of ladder = m x g x h
m is the mass of the pain can
g is the acceleration due to gravity
h is the height of the building
Input the variables;
Work done = 5 x 9.8 x 2 = 98J
Potential energy = 98J
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<h3><u>Answer;</u></h3>
a) 5.00 x 10^8 J
<h3><u>Explanation;</u></h3>
The work done to move the sailboat is calculated through the equation;
W = F x d
where F is force and d is the distance.
Substituting the known values from the given above,
W = (5.00 x 10⁴ N)(10 km)(1000 m/ 1km)
= 5.00 x 10⁸ J
Thus, the work done is <u>5.00 x 10⁸Joules</u>
<span>Answer: The acceleration of 10 kg object is greater than that of 18 kg object.
Explanation:
According to Newton's Second law:
F = ma --- (A)
Let's find the acceleration for both 10 kg and 18 kg objects!
The net force on both of these masses = F = 20N
(1) Acceleration of 10 kg object
Mass = m = 10 kg
Plug in the values in equation (A):
20 = 10 * a
Acceleration = a = 2 m/s^2
(2) Acceleration of 18 kg object
Mass = m = 18 kg
Plug in the values in equation (A):
20 = 18 * a
Acceleration = a = 1.11 m/s^2
2 > 1.11; therefore, 10 kg object has the higher acceleration compared to the acceleration of the 18 kg object.</span>
Answer:
They measured their train using their handspan
