Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has
a steep upward hill. Janice moves more slowly as she skates up the hil
1 answer:
Answer:
Now this just because of decrease in acceleration while moving in upward direction. Just because she faced the upward hill and to accelerate at the same rate while moving upward always need some upward force but as janice was not applying any sort of large amount of force but however she was skating she faced faced the decrease in acceleration.
Explanation:
Due to decrease in acceleration she slowed downed while moving upward.
The graph attached can be well understood to analyze the scenario.
You might be interested in
Explanation:
The given data is as follows.
Width of Styrofoam = 24.0 cm
Length of Styrofoam = 36.0 cm
Height of Styrofoam = 5.0 cm
Therefore, volume of the Styrofoam will be calculated as follows.
Volume = length × width × height
= (36.0 × 24.0 × 5.0)
= 4320
or, =
As Styrofoam partially sinks at 3.0 cm and total height of Styrofoam is 5.0 cm. Hence, height of Styrofoam above the water is (5.0 - 3 cm) = 2 cm.
So, volume of water displaced is as follows.
24.0 cm × 36.0 cm × 2.0 cm
=
Hence, mass of displaced water is as follows.
mass = density × volume
=
=
Since, book is placed on the Styrofoam. Therefore, mass of water displaced is also equal to the following.
Mass of water displaced = mass of book + mass of Styrofoam
= 1500 g + mass of Styrofoam
(1730 - 1500) g = mass of Styrofoam
mass of Styrofoam = 230 g
Therefore, calculate the density of Styrofoam as follows.
Density =
=
=
Thus, we can conclude that the density of Styrofoam is .