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He uses muscular energy to impart forward momentum to the rock,
in the amount of MRVR = 20 kilogram-miles per second.
Since the total momentum of the boy-skateboard-rock system is conserved,
the boy and skateboard must acquire the same amount of momentum in the
opposite direction.
M(B+S)V(B+S) = 20
V(B+S) = 20 / M(B+S)
= 20 / 60 = 1/3 mile per second.
(The questioner's typo ... writing "miles per second" where he meant "meters per second" ...
makes this quite a story ! The boy's pitch is no ordinary fling, endowing the rock with over
32,000 joules of kinetic energy. Thereafter, the rock ... or whatever is left of it after its
incendiary trip through the atmosphere at 20 miles per second ... is well on its way to the
moon, while the boy and his skateboard recoil backwards at a mere 1,200 miles per hour.
But the physics and the arithmetic are sound, even if they have no resemblance to reality.)
What else can I help you with?
Combined Vectors that go only forward or backward are one demensional?
True
A package weighed 1 3 more than half of the heaviest package the 2 combined weighed 100 kilograms how much does the smaller one weigh?
40 kg
What is newtons to kg?
Newtons and kilograms really measure different things (force versus mass). But if you assume normal Earth gravity, each kilogram has a weight of 9.8 Newtons. In this case, you can convert newtons to kilograms, dividing by 9.8.
What is 13 percent and 18 percent combined?
31% or 2.34% depending on whether "combined" is additive or multiplicative.31% or 2.34% depending on whether "combined" is additive or multiplicative.31% or 2.34% depending on whether "combined" is additive or multiplicative.31% or 2.34% depending on whether "combined" is additive or multiplicative.
How many combined days are there in the last 4 months of the year?
What is a 'combined day'?
What skateboard trick is a fs popshovit and a kickflip combined?
a hardflip
Combined Vectors that go only forward or backward are one demensional?
True
A parcel weighs 1 and half kilograms. A second weighs 800g more what is the combined weigh for the parcel?
A parcel weighs 1 and a half kilograms. A second parcel weighs 800g more what is the combined weight of the parcel.
Does a skate board have more wheels than a unicycle and tricycle?
It depends on the question. A Ripstick skateboard only has 2 wheels while a tricycle has 3 wheels. If you mean the number of wheels combined, then it will be equal, if you have a normal unicycle, skateboard, and tricycle.
How many cockatoos like max of 550 grams would it take to have a combined mass of 4.4 kilograms?
four
A child, a computer, and a bookshelf have combined mass of 36 kilograms. The child has a mass of 25 kilograms, and the computer has a mass of 2 kilograms. What is the mass of the bookshelf?
The mass of the bookshelf would be 36 kg - 25 kg (child's mass) - 2 kg (computer's mass) = 9 kg.
How can you combine a skateboard and scooter rack?
You can use a wall mount rack to combine a stakeboard and scooter rack. The wall mounted combined rack had a patent which was filled back in 2001. It helps to secure both products.
With what speed will a skateboard move?
The speed of a skateboard depends on various factors such as the force applied by the rider, the terrain, and the bearings of the skateboard wheels. On a flat surface with a typical push, a skateboard can reach speeds of around 5-10 miles per hour.
What is the weight of lungs and heart?
The heart weighs about 7-15 ounces (200-425 grams), while the lungs typically weigh about 2.2-2.9 pounds (1-1.3 kilograms) combined. These weights can vary depending on factors like age, gender, and overall health.
A package weighed 1 3 more than half of the heaviest package the 2 combined weighed 100 kilograms how much does the smaller one weigh?
40 kg
Different SI units are combined to obtain?
Different SI designations are combined to obtain units measure. For example velocity is meters (m) per second (s) or m/s, while acceleration is m/s^2. The measure of force in Newtons (N) using the combined units of kilograms (kg) through kg*m/s^2.
Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to produce to propel Nikolas if he wanted to accelerate at a rate of 1.2 m/s2 Round your answer to the nearest whole newton?
60 Newton.
