First, the acceleration is solved by dividing the velocity by time.
acceleration = 4 m/s / (1x10^-3s) = 4000 m/s²
Then, we solve for the force by multiplying the mass by acceleration.
F = m x a
Substituting the known values,
F = (12.3 mg)(4000 m/s²) = (12.3 x 10^-6 kg)(4000 m/s²)
F = 0.0492 N
Thus, the force of the froghopper is approximately equal to 0.0492 N.
Answer:
b.The frictional force and force exerted by the spring scale on the block, because they are a Newton's third-law pair.
Explanation:
Students connect a spring scale to a block on a rough horizontal surface. The students use the spring scale to measure the magnitude of the horizontal force needed to pull the block at a constant speed. Which of the following statements explains why two forces exerted between objects ar equal in magnitude?
a.A The gravitational and normal forces exerted on the block, because they are a Newton's third-law pair.
b.The frictional force and force exerted by the spring scale on the block, because they are a Newton's third-law pair.
c.The normal force and the frictional force exerted on the block, because objects always exert forces of equal magnitude on each other.
d.The frictional forces that the block and the surface exert on each other, because objects always exert forces of equal magnitude on each other.
solution \
the answer will be B
for a body to travel in a horizontal direction, it must be equal in direction to the frictional force which is in opposite direction to the force applied to move the block.
Also Newton's third law of motion must be obeyed , which states that action and reaction are equal and opposite
An electron is emitted in both positive and negative beta decay, although the positive one is called positron emission.
You would find the answer by doing 88-31 which is equal to 57. The answer is 57
Explanation:
Let the distance covered by the body be s, initial and final velocities be u and v respectively and time taken be t.
By first equation of motion:
Substituting the value of v in equation (1), we find:
Hence proved.