Explanation:
It is given that,
A jogger runs 300 m due west and then turns and runs 500 m due south
(a) Total distance = total path covered
Distance = 500 m + 300 m
= 800 m
(b) Total displacement = shortest path covered
(c) Speed = distance/time
Velocity = total displacement/total time
Hence, this is the required solution.
Answer:
17.81 rad/s²
Explanation:
Distance = 76 m = s
Time taken = 6.3 s
Diameter of tire = 43 cm = 0.43 m
Radius of wheel = 43/2 = 21.5 cm = 0.215 m
Acceleration
Angular acceleration
∴ Angular acceleration of the wheel is 17.81 rad/s²
Answer:
We can identify easily which block has more density, if we try to lift each one, and the heavier will be the one with more density. In this case the block of iron will be the one with more density.
Explanation:
To understand this we will give some numerical values to give the best explanation of this situation.
Let's say that we have the two blocks over one table, and over the table there is a special scale to measure the mass of an object.
Both block have the same dimensions, and seaching information of density by internet we find that the density for the iron is 7850 [kg/m^3], and the density for the aluminum is 2712 [kg/m^3]
Now the dimension of each bloack are 10*10*10 [cm] so, the volume will be 1000 [cm^3] = 0.001[m^3]
Now using the expression of density:
for the iron
for the aluminum
Therefore the weight of the iron will be always almost 3 times heavier than the weight of the aluminum.