Answer:
Explanation:
The graph show acceleration and time graph and it shows that the acceleration is constant.
a = 0.4m/s²
When a mass is added to the cart it is expected that the acceleration of the cart to reduce.
From newton law
F = ma
a = F/m
So, acceleration is inversely proportional to the mass, so as the mass increases the acceleration reduces.
In this question we are not given the information about the mass added but from the option given, we are going to chose any option that is less than the original acceleration of the cart before the mass was added (0.4m/s²). So, we are going to choose 0.27m/s².
We cannot chose 0m/s², the only time the acceleration will be zero is when the mass added is infinite (∞).
Then, a = F/∞ = 0m/s². So, since the mass added is finite. then, it cannot be zero.
<span>So the question is what gases form the atmosphere of Uranus. So Uranus and Neptune are classified as "ice giants". They have a similar atmosphere to "gas giants" Saturn and jupiter and Neptunes atmosphere is primarily composed out of hidrogen and helyum. So the correct answer is a.</span>
Answer:
21.8 m/s
Explanation:
At the top of the hill (crest), there are two forces acting on the motorcycle:
- The reaction force of the road, N (upward)
- The force of gravity, mg (downward)
Since the motorcycle is moving by circular motion, the resultant of these forces will give the centripetal force, so:
where the direction of the weight (mg) is equal to that of the centripetal force, and where
m is the mass of the cycle
g = 9.8 m/s^2 is the acceleration of gravity
v is the speed
r = 48.6 is the radius of the hill
The cycle loses contact with the road when the reaction force becomes zero:
N = 0
Substituting into the equation, we therefore find the maximum speed that is allowed for the cycle before losing constact:
Higher temperatures means more energy, and a solid phase means the particles are close together. This results in highly energized particles that bump into the particles close to them, who in turn bump into more particles.
Answer:
1.78 x 10² kg
Explanation:
KE = ½mv²
m = 2KE/v² = 2(2e4)/(54/3.6)² = 177.777...