Answer:
The correct answer is c
Explanation:
When a body is in rotational equilibrium, the relationship must be met
∑ τ = 0
Σ F d = 0
therefore the forces that are exerted on the body that are represented in the center of gravity are different from zero, therefore, to maintain balance the distance must be zero, therefore the center of gravity must be above the leg where the body is balancing
The correct answer is c
Answer:
Explanation:
Velocity of an object is a vector quantity. Its magnitude represents the speed of the object and its direction represents the direction of motion. ... If you have a displacement-time graph for an object in rectilinear motion, the slope of the graph tells you velocity of the object
Answer:
Displacement =
Magnitude of displacement = 13.89 units
Angle of displacement = 30.26°
Explanation:
Mark the co-ordinates of each of the end points of the vectors.
The marked co-ordinates are shown below.
Displacement is the shortest distance between two points. Here, displacement between the starting and end points is the vector .
Displacement vector for a point A from origin O is given as:
Magnitude is given as:
Direction of the vector is given as:
Therefore, displacement vector is:
Magnitude of displacement is given as:
Angle of displacement is:
°
Answer:
Her speed is 9.8 meter per second
Explanation:
Newton's second law states that acceleration (a) is related with force (F) by:
(1)
Here the only force acting on the firefighter is the weight F=mg so (1) is:
Solving for a:
Now with the acceleration we can use the Galileo's kinematic equation:
(2)
With Vf the final velocity, Vo the initial velocity and Δx the displacement, because the firefighter stars from rest Vo=0 so (2) is:
Solving for Vf