Answer:
2.85 m
Explanation:
From trigonometry,
Cosine = Adjacent/Hypotenuse
Assuming, The wall, the ladder and the ladder forms a right angle triangle as shown in fig 1, in the diagram attached below.
cos∅ = a/H....................... Equation 1
Where ∅ = Angle the ladder makes with the horizontal, a = The horizontal distance from the bottom of the ladder to the wall, H = The length of the ladder.
make a the subject of the equation
a = cos∅(H)..................... Equation 1
Given: ∅ = 68 °, H = 7.6 m.
Substitute into equation 2
a = cos(68)×7.6
a = 0.375×7.6
a = 2.85 m.
Hence the horizontal distance from the bottom of the ladder to the wall = 2.85 m
A force is a push or pull upon an object resulting from the object's interaction with another object.
Answer:
answer is option (c) child labour
Answer:
Momentum of mass 
is 83·7 kg m/s towards north
Momentum of mass 
is 38·72 kg m/s towards east
Explanation:
Given
Mass of = 6·2 kg
Mass of = 4·4 kg
Velocity of mass = 
= 13·5 m/s
Velocity of mass = 
= 8·8 m/s
Momentum of mass = × = 6·2 × 13·5 = 83·7 kg m/s
Momentum of mass = × = 4·4 × 8·8 = 38·72 kg m/s
As mass is moving North, the direction of momentum will also be in that direction because the direction of momentum will be in the direction of velocity
As mass is moving East, the direction of momentum will also be in that direction because the direction of momentum will be in the direction of velocity
∴ Momentum of mass is 83·7 kg m/s towards north
∴ Momentum of mass is 38·72 kg m/s towards east
