Answer:
More force
Explanation:
Object A has more mass than object B
For object A to accelerate at the same rate as object B, it will need more force.
According to Newton's second law of motion "the net force on a body is the product of its mass and acceleration".
Net force = mass x acceleration
Now, if a body has more mass and needs to accelerate at the same rate as another one with a lower mass, the force on it must be increased.
Answer:
Kinematics is the study of motion of a system of bodies without directly considering the forces or potential fields affecting the motion. In other words, kinematics examines how the momentum and energy are shared among interacting bodies.
Answer:
26.06
Explanation:
One thing to note first is that, after the ethyl alcohol and water is mixed, the heat energy (Q) is equal for both of them. So:
<h3>m c ΔT (water) = m c ΔT (ethyl) </h3>
Second thing to note is that ΔT is just the absolute value of the final temperature of the solution minus the initial temperature of the ethyl, or water. So the previous equation becomes:
<h3>m c (Tfin - Tinit) (water) = m c (Tfin - Tinit) (ethyl) </h3>
And since we know the mass and specific heat of the water and ethyl alcohol, we can substitute those in:
<h3>2093(Tfin - 22) = 1225(33 - Tfin) </h3>
(I wrote 33 - Tfin for ethyl because ΔT should be a positive number in this case)
Now finally we can expand out the parenthesis and use a little algebra to solve:
<h3>2093Tfin - 46046 = 40425 - 1225Tfin</h3>
Now use algebra to separate the Tfin coefficients onto one side and everything else on the other, and we get:
<h3>3318Tfin = 86471</h3>
And when you divide both sides be 3318, you get your answer of:
<h3>Tfin = 26.06118 or 26.1 for significant figures</h3>
Hope that helps!
Answer:
6.4m/s
Explanation:
The total mechanical energy of the man is 1780J.
This mechanical energy is the energy due to the motion of the body and it is a form of kinetic energy.
Also, mass = 87kg
Kinetic energy = 
m v²
m is the mass
v is the velocity
1780 = x 87 x v²
v² = 40.9
v = 6.4m/s
