An object has a relativistic momentum that is 7.3 times greater
than its classical momentum.
What is its speed?
Express your answer using two significant figures.
v=__________c
Compare and contrast the relativistic and classical expressions
for the kinetic energy of an object.
How does the relativistic expression explain the impossibility
of an object to reach the speed of light?
An 8kg mass is observed traveling with a speed of .08*c.
What is its classical momentum?
What is the relativisitic momentum?
What is the difference between the two values?
Repeat the problem for a speed of .2*c and .8*c
12. Object 1 has twice the mass of Object 2. Object 2 has the
same momentum as Object 1. Which of the following is true? a. One
object has 0.707 times the kinetic energy of the other. b. One
object has twice the kinetic energy of the other. c. One object has
4 times the kinetic energy of the other. d. Both objects have the
same kinetic energy.
1.When the mass of an object is the same, is the total momentum and kinetic energy preserved? The reason is that?
-
2. When the mass of the object is different, is the total momentum and kinetic energy preserved? The reason is that?
-
3. When two objects collide, is the amount of impact received by the two objects the same? The reason is that?
Data Table A
Mass of Cart (kg)
Impulse (N.s)
Velocity (m/s)
Momentum (N.s)
Change in Momentum
%
Diff.
Before
After
Before
After
0.2695
+0.351
- 0.673
+0.659
Data Table B
Mass of Cart + mass bar (kg)
Impulse (N.s)
Velocity (m/s)
Momentum (N.s)
Change in Momentum
% Diff.
Before
After
Before
After
0.4695
+0.346
-0.377
+0.372
% Difference= 2×(Change in
momentum-Impulse)(Change in
momentum+Impulse)×100=
Questions
What are possible reasons why the change in momentum is
different from the measured impulse?...