Explanation:
It is given that,
The acceleration of the toboggan,
Initial speed of the toboggan, u = 0
We need to find the distance covered by the toboggan. Using the second equation of motion as :
At t = 1 s
At t = 2 s
At t = 3 s
Hence, this is the required solution.
Refer to the diagram shown below.
The angle is in quadrant 4, therefore cos θ is positive.
The length of the hypotenuse is determined from the Pythagorean theorem as
c² = 3² + 4² = 25
c = 5
Calculate cosine of the reference angle.
cos θ = 3/5
Answer: 3/5
A. Molecular solids tend to have lower melting points than Ionic so it would be Ionic if it weren't for Molecular.
Answer:
volume of substance of weight of mercury is 13593 kilograms
Answer:
Explanation:
Let the force at the support end is R and at the left end is F.
According to the equilibrium condition
F + R = 280 + 500
F + R = 780 .... (1)
Take moments about G.
F x 1.5 + R x 0.5 = 500 x 1.5
3F + R = 1500 .... (2)
Subtract equation (1) from equation (2), we get
2F = 1500 - 780
F = 360 N
R = 780 - 360
R = 420 N
(a) Force at support is 420 N
(b) force at the left end is 360 N.