Angles at a point make 180° at a straight line.
Lx = 180° - (90+90)
Lx is 70°
Lx = 180° -(64+71)
= 180° - 13J°
= 45°
By using sine law
21/siny = length of pole/ sin 64
∴Length of pole = 21 sin 64/sin u5 = 26.69
Then the length of pole = 27ft
Answer:
Part a)
Part b)
Part c)
Explanation:
Velocity just before it strike the ground is given as
since there is no friction in horizontal direction so its speed in horizontal direction will remain same
Part a)
velocity in X direction
time taken by the skier to reach the ground is given as
now in the same time it will cover vertical distance
so magnitude of initial speed is given as
Part b)
Direction of velocity
Part c)
Now in order to find the height of the ramp we can find the vertical displacement
The answer is B: it has made repetitive tasks easier
We can use Newton's second law to find out. This says F=ma, where m is the mass we seek:
So we see the mass is 3kg
Answer:
Toasting in a toaster is usually considered by (infra red) radiation. But the hot coils touch the toast so an element of heating by conduction occurs as well.
Explanation: