Answer:
1.33m/s²
Explanation:
Given parameters:
Initial velocity = 5m/s
Final velocity = 25m/s
Time taken = 15seconds
Unknown:
Acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time.
Acceleration = 
v is the final velocity
u is the initial velocity
t is the time taken
So;
Acceleration = 
= 1.33m/s²
Only first is kinetic.
So 2-3-4 are not
Answer:
Give them assignment on the pandemic.
Explanation:
If you wish, each student can talk about some other aspect of the pandemic that seems important and interesting then you have to give them the assignment of presentation and give reward on them. The students will definitely make the presentation on other aspects of the pandemic and when they present it in the class it enhance the knowledge of other students as well.
How do we find the Average Speed ?
The Average Speed is the distance traveled for the object, divided by the elapsed time taken to travel that distance, so the formula is :
<em>S = D / T</em>
where S = Average Speed, D = Distance, and T = Times
Here the object is the ball, the distance is 9 meters and the time elapsed for the ball to roll down the street is 3.5 seconds. Applying the formula we get :
S = 9 / 3.5 ≈ 2.6 metres per second
The ≈ symbols (which is the <em>wavy equal sign</em>) means we can't write the exact result, because there is an infinite quantity of numbers after the decimal point. So we need to give an approximation, since the result is 2.57142857142857...etc. we choosed to round up the result to 2.6.
Answer: 0.439488 N
Explanation:The apparent weight of the metal is computed as
apparent weight = weight - weight of the displaced fluid
To compute the weight of the metal, we use the following formula:
where
Note that the volume is unknown but we can compute this because the metal is a cube with edge = 2 cm = 0.02 m. So, the volume of the metal is given by
Thus, the weight of the metal is computed as
Next, we compute the displaced weight or buoyancy, which has the following formula
where
Note that the displaced volume is equal to the volume of the submerged metal. Since the metal has a volume of
, the displaced volume is
.
Thus, the weight of the displaced fluid is calculated as
Therefore,
apparent weight of the metal
= weight of the metal - weight of the displaced fluid
= 0.517968 N - 0.07848 N
apparent weight of the metal = 0.439488 N
