Explanation:
Mass of the car = 2000N / 10 = 200kg.
Fnet = ma. Assuming there is only the horizontal force acting on the car, then
F = (200kg)(3.3m/s²) = 660N.
Question:
What quantity do units represent in a value? A. Size B. Direction C. Magnitude D. Dimension
Answer:
D. Dimension
Explanation:
A unit is simply the measurement given to a dimension. In other words, units represent dimensions. For example, consider a ruler that is 20m long.
i. The value is 20m.
ii. The magnitude of the measurement is 20
iii. The unit of the measurement is meters(m) and that essentially represents the dimension (length) of the ruler.
Heat always flows from higher temperature to lower temperature. So option A. heat will flow from the air into the coolant is the correct answer.
Answer:
1- The lank with the least slope will be the easiest to climb because it will require the least force.
2- All three paths will require the same energy as the work done will be the same in all three cases.
Explanation:
1- Work done W = Force x Displacement i.e. W = F × cosФ where 'Ф' is the angle between force and displacement. Smaller the angle least is the force required to climb. Hence the path with least slope will be easier to climb.
2- Since W = F × cosФ as the angle increase cos Ф decrease which means the slope is increase and consequently the force required also increases but the total work done remains the same. Hence the energy required to climb all three Lanks will be the same.
Answer:
20600N
Explanation:
Given parameters:
Mass of the roller coaster = 515kg
radius = 10m
Speed = 20m/s
Unknown:
Force of the track pushing up on the vehicle = ?
Solution:
The force pulling the roller coaster along the track is the centripetal force.
To find the centripetal force, use the expression below;
F =
where;
m is the mass
v is the speed
r is the radius
Now insert the parameters and solve;
F = = 20600N