Answer:
Objects move according to their net force, or the total amount of force acting on them. Balanced forces are just that, balanced. An object with balanced forces will not move because the opposing forces will cancel each other out. However, if there are unbalanced forces, the object will move in accordance with the force that is greater. When moving though, there is always friction. Whether you be underwater, on the ground, or in the air there is always friction on the Earth. (Besides vacuums, of course.)
Force is equal to mass x acceleration.
With that you can find the forces of the object if you know its mass and acceleration.
Explanation:
The motion of an object can be described in many ways, including path, speed, velocity, and acceleration.
Answer:
Speed = 20 m/s
Explanation:
The speed of a bus is 72 km/h
The SI unit of speed is m/s
We need to convert it into m/s
We know that,
1 km = 1000 m
1 h = 3600 s
It means,
So, the speed of the bus is 20 m/s.
Answer:
Driver hits the dog
Explanation:
From kinematics equation
and making a the subject
F=ma=800*-4=-3200 N
The driver is required to apply a force of 3200 N to effectively not hit the dog. However, when the driver applies 2000 N, this is less the required force by 1200 N hence the driver hits the dog.
Answer: x = 73
Explanation:
Firstly, arithmetic mean is the average of the set of numbers given in question while median is the number that is placed at the middle of sets of distribution after been arranged in either ascending or descending order.
According to the question the mean will give us sum total of the number divided by the total numbers given i.e
63 + 67 + x + 80 + 82/5
Since the numbers are already listed in increasing order, median will be 'x'
Since the arithmetic mean is equal to the median according to the question, we then have;
63 + 67 + x + 80 + 82/5 = x
Cross multiplying we have;
63 + 67 + x + 80 + 82 = 5x
292+x = 5x
292 = 5x - x
292 = 4x
x = 292/4
x = 73
The sun is a star, not a planet. Jupiter is the biggest planet in the solar system. :)