Answer
In this Question we have given
acceleration, a=3m/s^2
and time, t=2s
we have to find speed, v=?
Apply newton's Ist equation of motion which goes as
[/tex]
In this problem the car starts from rest it means initial velocity, u =0.
Putting values of u, a and t in first equation of motion
Therefore speed of car after 2 second will be 6m/s
Note: In this type of problems. First check the units of all quatities. As all the quantities must be first changed into matching units i.e cgs or s.i. units before applying the equation.
Answer:
The time is 0.90 sec.
Explanation:
Given that,
Height = 4.00 m
We need to calculate the time
Using equation of motion
For free fall, u = 0
Where, s = distance
g = acceleration due to gravity
t = time
Put the value into the formula
Hence, The time is 0.90 sec.
The specific heat of the substance will be 0.129 J/g°C.
<h3>What is specific heat capacity?</h3>The amount of heat required to increase a substance's temperature by one degree Celsius is known as specific heat capacity.
Similarly, heat capacity is the relationship between the amount of energy delivered to a substance and the increase in temperature that results.
The given data in the problem is;
Q is the amount of energy necessary to raise the temperature = 3,000.0 j
M is the mass= 0.465 kg.
Δt is the time it takes to raise the temperature.=50°c
s stands for specific heat capacity=?
Mathematically specific heat capacity is given by;
Hence the specific heat of the substance will be 0.129 J/g°C.
To learn more about the specific heat capacity refer to the link brainly.com/question/2530523