Answer:
Explanation:
Let say the ball is projected at an angle with horizontal
So here two components of the velocity of the ball is given as
now the displacement in x direction is given as
in y direction it is given as
now from above two equations
The speed of the two boats are 7 miles per hour and 24 miles per hour.
Explanation:
Let the speed of the first boat be x miles per hour and second boat be x+17 miles per hour.
As they move at right angle to each other, this problem can be solved using Pythagoras theorem.
The two boats will form a right angle with hypotenuse 25 miles after one hour.
Applying the theorem we get,
∴ x= -24 and 7
As speed cannot be negative,
We get speed of first boat = 7 miles per hour and
Speed of second boat = 7+17 = 24 miles per hour.
The acceleration of gravity on Pluto is 0.62 m/s² .
The acceleration of gravity on Earth is 9.81 m/s² .
Earth's gravity is (9.81/0.62) = 15.8 times as strong as Pluto's gravity.
So any object that weighs 2.7N on Pluto would weigh
(2.7N) x (15.8) = 42.7 N on Earth .
42.7 Newtons = about 9.6 pounds .
Answer:
4 seconds
Explanation:
Average acceleration is change in velocity over change in time:
a = Δv / Δt
Δt = Δv / a
Δt = (15 m/s - 5 m/s) / 2.5 m/s²
Δt = 4 s
In question 2
The second line of equation would be 54 = 108 + 10a
get the rest from that