Answer:
V = 645 mm³
Explanation:
7) Volume of hexagonal prism is;
V = base area × height
Base area = 43 mm²
Height = 15 mm
Thus;
V = 43 × 15
V = 645 mm³
The time it takes for an object to reach a certain level given the distance and the initial velocity can be calculated through the equation,
d = V₀t + 0.5gt²
Where d is the distance, V₀ is the initial velocity, g is the acceleration due to gravity and t is time. Substituting the known values from the given above,
25 = (-7.5)(t) + 0.5(9.8 m/s²)(t²)
The value of t from the equation 3.15s. Hence, it will take the object 3.15 seconds to reach the ground.
Answer:
-6
Explanation:
FRICTIONAL force=-300N,NORMAL REACTION,R=+50.0
Ú=F/R
=-300/+50.0
=-6
Answer:
3.2N
Explanation:
Given parameters:
Coefficient of kinetic friction = 0.43
Weight of box = 7.4N
Unknown:
Force of kinetic friction = ?
Solution:
The force of kinetic friction is given as:
Force of kinetic friction = UN
U is the coefficient of friction
N is the weight
Force of kinetic friction = 0.43 x 7.4 = 3.2N