Weight, in physics elaborately is a type of force which pertains to the gravitational attraction of the earth and the mass of the object.
Hence, the formula for weight is mass x gravity.
Mathematically - w = m x g
Solution:
Mass = 8 kg
Gravity = 10 m/s2
Weight = 10 x 8
Weight = 80 kg*m/s2 or 80N
Therefore the weight of the 8 kg object is 80 newton.
Answer:
Speed of cart's might be less than the high speed after 5 seconds.
Explanation:
Given that,
A fan cart with the fan set to high rolled across the floor.
Let the speed of fan cart with set to high is per second.
The fan supplies a force to the cart. If a lower fan speed were used, less force would be applied. This would cause a slower change in the cart's speed. So, the cart would be rolling more slowly than per second after 5 seconds. The speed of cart's might be less than per second.
Force is needed
A. for a moving object to keep moving at the same speed and direction
B. for a moving object to change its speed
C. for a motionless object to remain still
D. to prevent a moving object from turning
Hence,
Speed of cart's might be less than the high speed after 5 seconds.
Scientists continue to debate this.
B sunlight, because the sun has energy and that gives the soil energy and the plant take that energy and is able to grow.