Answer:
12.5 J
Explanation:
Force, F = 25 N
Distance, d = 0.5 m
The direction of force and the displacement is same.
Work is defined as the product of force in the direction of displacement and the displacement.
Work = Force x displacement x CosФ
Where, Ф be the angle between force and the displacement
Here, Ф = 0°
So, W = 25 x 0.5 x Cos0°
W = 12.5 J
Answer: d
Explanation:
had the same study island question
To solve this problem it is necessary to apply the concepts related to the orbital velocity of a satellite on earth.
This concept is expressed in the equation,
Where,
G = Universal Gravitational constant
Mass of the Earth
Therefore the ratio of the velocity from two satellites is,
The ratio between the two satellites is the same, then
Therefore the correct option is B.
the friction if sliding is greater than rolling
Answer:
Exposure to the Atmosphere
Composition of Rock
Surface area of the rock
Climate
Time
Explanation:
Exposure to the Atmosphere - how much of the rock mass is exposed to the environment affects how quickly the rock will be weathered by that very environment
Composition of Rock - what kind of minerals the rock is made of, how easy it is for those minerals to disintegrate and how quickly the react with water and air.
Surface area of the rock - a rick that has a wider surface or smaller pieces is more exposed than one that is a lump. A larger surface area increases the rate of weathering
Climate - if a rock is an area where there are high temperatures or very low temperatures, the rate of weathering is likely to increase. A similar point can be made about a region that experiences a lot of rain.
Time - the longer the rock is exposed to harsh conditions, the more it will experience weathering
