Answer:
The other two small angles are 45° each
Explanation:
Given data in the problem:
The triangle is a right triangle
thus,
one of the angle is 90°
now,
let the other two angles be x and y
thus,
it is given that:
x = 2y - 45°
also in a triangle
sum of all the angles = 180°
thus,
x + y + 90° = 180°
or
x + y = 90°
now, substituting the value of x from the above relation between x and y, we get
2y - 45° + y = 90°
or
3y = 135°
or
y = 45°
also,
x = 2y - 45°
or
x = 2 × (45°) - 45°
or
x = 45°
hence, <u>the other two small angles are 45° each</u>
Potential energy at any point is (M G H). On the way down, only H changes. So halfway down, half of the potential energy remains, and the other half has turned to kinetic energy. Half of the (M G H) it had at the tpp is (0.5 x 9.8 x 10) = 49 joules.
Answer:
option B
Explanation:
given,
Force exerted by the hydraulic jack piston = F₁ = 250 N
diameter of piston, d₁ = 0.02 m
r₁ = 0.01 m
diameter of second piston, d₂ = 0.15 m
r₂ = 0.075 m
mass of the jack to lift = ?
now,




F₂ = 14062.5 N
F = m g


m = 1435 Kg
hence, the correct answer is option B
Answer:
Energy needed = 1100 kJ
Explanation:
Energy needed = Change in kinetic energy
Initial velocity = 15 m/s
Mass, m = 1600 kg

Final velocity = 40 m/s

Energy needed = Change in kinetic energy = 1280000-180000 = 1100000J
Energy needed = 1100 kJ