A car is traveling at 20 m/s. It takes the car 120s to go from one intersection to a second. What was the displacement of the car between the two intersections?
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We don't know if the road is perfectly straight between the intersections, or if the road bends, curves, or turns between them. So we don't have enough information to calculate the displacement between them.
But we can calculate the distance the car traveled between them.
Distance = (speed) (time)
Distance = (20 m/s) (120 s)
Distance = 2,400 meters
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Answer:
Explanation:
The force of gravity is the physical force exerted by the mass of a planet on the objects that are within its gravitational field. In other words, this law establishes that bodies, by simply having mass, experience a force of attraction to other bodies with mass.
The force of gravity depends on the mass of each object. The force with which two objects are attracted is proportional to their mass and decreases rapidly with distance:
where G is the universal gravitation constant, whose value is
G=6.673*10⁻¹¹
This expression indicates that the gravitational force that a point mass M exerts on another point mass m that is at a distance r from the previous one is directly proportional to the product of the masses and inversely proportional to the square of the distances that separates them.
Given the above, it is possible to say that two reasons why we feel the Earth's gravity more strongly than the moon's gravity are:
- Being the mass of a person the same, the mass of the Earth is greater than the mass of the Moon
- The distance r between the Earth and us is much closer than the distance r between the Moon and us (remember that the Earth exerts its force of gravity from the center)
This causes the force exerted by the Earth on us to be much greater.
1). The Earth has about 80 times as much mass as the Moon has.
2). The Earth is closer to many of us than the Moon is.
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a parachute has a cupping effect where it can only take so much, so it slows down your descendence
When the speed of the bottle is 4 m/s, the KE is _____ kg m2/s2.
When the speed of the bottle is 5 m/s, the KE is _____ kg m2/s2.
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Answer:
umm C i think
Explanation:
N
How far was the spring stretched at the moment it was released?
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To find the force on the block, use Newton #1: F = m A
Force = (2.3 kg) x (0.27 m/s²)
Force = (2.3 x 0.27) kg-m/s²
Force = 0.621 Newton
The spring stretches 1 meter when to pull with 18 N of force.
To pull with only 0.621 N of force, it only has to stretch (0.621/18) of a meter. That's 0.0345 meter, or 3.45 cm .