Answer:
A. 20 N
Explanation:
weight of book is 2×10=20N .....
Explanation:
Fnet = ma.
Assume that there is no resistance acting on the mass. Therefore a = 15N / 45kg = 0.33N/kg or 0.33m/s^2.
Answer:
Please see below as the answer is self- explanatory.
Explanation:
- Any time that an object changes direction (from leftward to rightwward, or from upward to downward) the velocity must be zero just for one instant, when is on the verge of changing the direction.
- This is needed because velocity changes as a continuous function of time, so it needs to cross the t-axis when passing from positive to negative or vice versa.
- However, the claim that in the moment that velocity is zero, the acceleration is also zero, is false.
- Due to acceleration is the rate of change of velocity, and velocity is a vector, this means at any time there is a change of direction, there is an acceleration that is non-zero.
- For example, when an object that has been thrown upward, reaches to its maximum height, just one instant before starting to fall, the velocity becomes zero, but the acceleration (which causes the object to fall) is non-zero, due to it's the acceleration due to gravity.
Answer:
This is the equation for elastic potential energy, where U is potential energy, x is the displacement of the end of the spring, and k is the spring constant.
U = (1/2)kx^2
U = (1/2)(5.3)(3.62-2.60)^2
U = 2.75706 J
Read more on Brainstorm - httpd://brainstorm/question/7981441#read more
Explanation:
The role of thermal energy is to balance the electrical energy lost from the light bulb.
<h3>
Energy conservation</h3>
The law of energy conservation states that energy can neither be created nor destroyed but can be transformed from one form to another.
<h3>Thermal energy</h3>
This is a form of energy that occurs due to rise in temperature.
The role of thermal energy is to balance the electrical energy lost from the light bulb.
Learn more about conservation of energy here: brainly.com/question/166559
