Answer:
correct answer is D
Explanation:
answer is perihelion and aphelion
ANSWER:
3 seconds
STEP-BY-STEP EXPLANATION:
We have the following formula:
Where, v is the final velocity that is equal to 4 m/s, u the initial velocity that is 10 m/s, a is the acceleration that would be equal to -2 m/s^2, we replace and calculate for t:
Answer:
748.8 kJ
Explanation:
Kinetic energy is given by
where m is the mass of the body, v is the velocity
Substituting 2600 Kg for m and 24 m/s for velocity
Therefore, kinetic energy is 748.8 kJ
Answer: 2.5N
Explanation:
Given the following :
Mass of block (m) = 2kg
Coefficient of static friction (μs) = 0.4
Horizontal force applied to the block = 2.5N
The frictional force (Ff) between the block and the floor is :
First calculate the maximum static frictional force:
Frictional force = Coefficient of static friction(μs) × normal reaction(R)
Normal reaction(R) = mass × acceleration due to gravity (10m/s^2)
R = 2 × 10 = 20
Fmax = μs × R
Fmax = 0.4 x 20 = 8N
Here, since the applied force (2.5N) is less than maximum frictional force(8N).
The force of friction between the block and the floor will be equal to the applied force of 2.5N due its ability to adjust itself in other to ensure equilibrium.
According to the Archimedes principle, if an object is immersed in a fluid, it experiences an apparent loss of weight which is equal to the weight of fluid displaced. The buoyant force which acts in the upward direction opposite to the weight of the object causes the apparent loss in weight. (Hope that helps)