The minimum force required to lift the box at constant velocity is determined as 274.4 N.
<h3>
Minimum force required</h3>
The minimum force required to lift the box at constant velocity is the tension in one of the pulleys, and the magnitude is calculated as follows;
2T = mg
where;
- m is mass of the box
- T is the minimum force required
2T = mg
T = mg/2
T = (56 x 9.8)/2
T = 274.4 N
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(B) All objects attract other objects
To be specific, the following formula defines this theory very clearly:
F = G * (m1 * m2) / r^2
The Force is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Cereals are usually fortified with three most common minerals and vitamins which are:
1- Iron
2- Vitamin D
3- Vitamin B-12
Comparing the above to the given choices, we will find that the best answer is:
b. iron
Answer:
Explanation:
Kinetic energy can be found using the following formula.
where <em>m</em> is the mass and <em>v</em> is the velocity.
The mass of the toy plane is 20 kilograms and the velocity is 10 meters per second.
Substitute the values into the formula.
Solve the exponent first.
- (10 m/s)²= 10 m/s *10 m/s= 100 m²/s²
Multiply the last two numbers together.
Multiply by 1/2 or divide by 2.
- 1 kilogram square meter per square second is equal to 1 Joule.
- Our answer of 1000 kg*m²/s² is equal to 1000 Joules
The kinetic energy of the toy plane is <u>1000 Joules</u>
Answer:
the answer is b. reflective
