Answer:
The acceleration of the rocket is 10 m/s².
Explanation:
Let the acceleration of the rocket be 
m/s².
Given:
Mass of the rocket is, 
Thrust force acting upward is, 
Acceleration due to gravity is, 
Now, force acting in the downward direction is due to the weight of the rocket and is given as:
Now, net force acting on the rocket in upward direction is given as:
Therefore, from Newton's second law, net force acting on the rocket is equal to the product of mass and acceleration.
Therefore, the acceleration of the rocket is 10 m/s².
You need to form a hypothesis based on what is already known about gold and then devise an experiment to test this hypothesis.
For example, the density of gold is well known. So your hypothesis would be that if the rock were gold, you could predict the amount of water displacement in a beaker simply by measuring the weight of the rock.
The steps would be:
1. research what is already known about your field of investigation (in this case <em>gold</em>).
2. Using that information, formulate a hypothesis that allows you to make predictions.
3. Devise an experiment that can test your predictions.
the following statements about the motion of the elevator could be true at time t2 is
c. The elevator is moving downward at constant speed.
Explanation:
- Under given situation, the elevator is at rest and the reading on the scale is 500N.
- After some time t2, the person is still standing on the scale and the reading on the scale is 400N .
- It is because if you stand on a scale in an elevator which is accelerating upward, your body will feel heavier because the elevator's floor pressure which presses harder on your feet, and this is why the scale will show a higher reading than the time when the elevator is at rest.
- Similarly on the other hand, when the elevator accelerates downward, your body will feel lighter. The force which is exerted by the scale is called as the apparent weight; which means it does not change with constant speed.
- Applying Newton's second law, which concludes about this particular statement about force exerted on a body when at rest and when in motion.
The individual charges flow from negative to positive in the circuit
(conventional) current flows clockwise (positive to negative)
Ip = Ib = In
Q (charge) = I*t (current*time)
less charge = less current
The car is initially traveling north at 17.7 m/s, and after 12 s, its velocity is 14.1 m/s, still due north. This means that the direction of the car has not changed, so we can already say that the direction of the acceleration is north (if the magnitude of the acceleration is positive) or south (if the magnitude of the acceleration is negative).
To find the magnitude of the average acceleration, we must calculate the ratio between the change in velocity and the time taken:
Since the acceleration is negative, it means it is in the opposite direction to the motion of the car, therefore south. Therefore, the correct answer is
b) 0.30 m/s2, south
