Speed / time this is how you find momentum
Answer:
0.624 kg
Explanation:
We are given that
Mass of one block,
We have to find the mass of second block.
Mass of second block,
Substitute the values
Hence, the mass of second block=0.624Kg
here two forces are acting at different angles and we need to find its resultant
forces are given as
@125 degree
@200 degree
now in order to find its resultant we will find its components
here it is given as
Now net force in x and y direction is given as
so net force is given as
now the magnitude is given as
angle of the force is given as
so net resultant force is 917.13 N at 163.4 degree
Looking out from a vertex with angle θ, sin(θ) is the ratio of the opposite side to the hypotenuse , while cos(θ) is the ratio of the adjacent side to the hypotenuse . No matter the size of the triangle, the values of sin(θ) and cos(θ) are the same for a given θ, as illustrated below.
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Answer:
a) a = 19.0 m/s²
b) a = 2.9 m/s²
Explanation:
a) We draw the free body diagram of the box. There are 4 forces: the normal force N, the weight mg, the constant force F and the kinetic frictional force μ_kN. We can take the coordinate system which is rotated 55° from the horizontal, to ease the calculations. So, we write the equations of motion in each axis:
Substituting the expression for N in the first equation, we have:
If we plug in the given values, we have:
Since we chose the right-downward direction as positive, the positive sign in this case means that the box is accelerated downwards above the ramp.
b) In this case, the constant force F and the kinetic frictional force μ_kN point to the opposite side. In other words, we can just only change the sign of this two forces in the equations of part (a) and obtain:
Plugging in the given values:
Since we chose the right-downward direction as positive, the negative sign in this case means that the box is accelerated upwards above the ramp.
This means that the magnitude of the acceleration in this case is 2.9m/s².