Answer:
1) Unbalanced
2) Balance
3) Balanced
4) Unbalanced
5) Unbalanced
Explanation:
For 1 and 5, since the objects are not at a constant speed/velocity, their forces must be unbalanced.
For 2 and 3, their speeds are constant so that means the force is balanced. If the bycicle or box started accelerating, that would indicate an unbalanced force
For 4, the speed is constant, but it's direction is not indicating another unbalanced outside force causing it to turn. The force is unbalanced.
Answer:
the moon has different gravitational force.
The dirt pushing back is the 'resistance' force. It RESISTS your attempts to shovel it.
Answer: The recoil speed is - 8.9604.
m/s.
Explanation: According to the Third Law of Newton, every action has an oppsite and equal reaction, and the Second Law of Newton, Force=mass·acceleration. Acceleration is a variation in velocity by any given time, so Force = mass·velocity·time.
Combining the two laws, there is : m1·v1 = - m2·v2. This is the Law of Conservation of Momentum.
Substituting and calculating:
v2 = - (
) · v1
v2 = - 
· 5.24.
v2 = - 8.9604.
The recoil speed of the thorium nucleus is - 8.9604.m/s.
Answer: The scientist should revise the question to address a gap in knowledge.
Explanation:
The scientist should revise the question to address a gap in knowledge. is the correct option this is because of the fact that on revising the question as well as observing the findings of the other scientists the scientist may realize the fact that what other variable can be used for the purpose of the experiment and what other factor can be included in framing the question. This will help in evolution of the same findings by many researchers. This will add up more knowledge in the overall research procedure.
