An object travels with velocity v = 4.0 meters/second and it makes an angle of 60.0° with the positive direction of the y-axis.
1 answer:
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Answer: The density of glycerine will be
Explanation:
Density is defined as the mass contained per unit volume.
Given:
Density of glycerine=
1 lbm = 0.454 kg
1 kg =
Thus
Also
Putting in the values we get:
Thus density of glycerine will be
Answer:
The driver's average velocity is 82.35 km/h.
Explanation:
Given:
The motion of the driver can be divided into 3 parts:
i. Displacement of the driver in 1.5 hours = 135 km
ii. Rest for 45 minutes.
iii. Displacement in next 2 hours = 215 km
The direction of motion remains same (east).
Now, total displacement of the driver is, km.
Rest time is 45 minutes. Converting it to hours, we need to use the conversion factor hour.
So, 45 minutes in hours is equal to hours.
Now, total time taken for the complete journey is,
Average velocity is given as:
Therefore, the driver's average velocity is 82.35 km/h