Answer:
Length of the ramp, l = 31.22 feet
Explanation:
It is given that,
A doorway is 2.45 ft above the ground, AB = 2.45 ft
Angle between the ground and the ramp is, 
Applying trigonometry,
AC = 31.22 ft
So, the length of the ramp is 31.22 feet. Hence, this is the required solution.
Answer: A
Explanation: the lower the time, the faster you complete the race ( i also had this question before)
<u>Yes. The speed of a rocket can exceed the exhaust speed of the fuel.</u>
How this is explained?
- The thrust of the rocket does not depend on the relative speed of the gases or the relative speed of the rocket.
- It depends on conservation of momentum.
What is conservation of momentum?
- Conservation of momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant.
- Momentum is equal to the mass of an object multiplied by its velocity and is equivalent to the force required to bring the object to a stop in a unit length of time.
- For any array of several objects, the total momentum is the sum of the individual momenta.
- There is a peculiarity, however, in that momentum is a vector, involving both the direction and the magnitude of motion, so that the momenta of objects going in opposite directions can cancel to yield an overall sum of zero.
To know more about conservation of momentum, refer:
brainly.com/question/7538238
#SPJ4
Answer:75.71g≈75.7
Explanation:Mass = Density ⋅ Volume = 11.3 ⋅ 6.7 = 75.71g
Answer:
a)Vr= 5 mph
b)Vr= 115 mph
Explanation:
Lets
your velocity ,u= 60 mph
velocity of truck ,v= 55 mph
When object are moving in opposite direction the relative velocity = u +v When object are moving in opposite direction the relative velocity = u - v
a)
Truck is moving in the same direction ,so the relative velocity
Vr= = u - v
Vr= 60 - 55
Vr= 5 mph
b)
Truck is moving in the opposite direction ,so the relative velocity
Vr= = u+v
Vr= 60 + 55
Vr= 115 mph
