answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
KiRa [710]
1 year ago
14

A solid ball is released from rest and slides down a hillside that slopes downward at 65.0" from the horizontal

Physics
1 answer:
PilotLPTM [1.2K]1 year ago
3 0
Setting reference frame so that the x axis is along the incline and y is perpendicular to the incline 
<span>X: mgsin65 - F = mAx </span>
<span>Y: N - mgcos65 = 0 (N is the normal force on the incline) N = mgcos65 (which we knew) </span>
<span>Moment about center of mass: </span>
<span>Fr = Iα </span>
<span>Now Ax = rα </span>
<span>and F = umgcos65 </span>
<span>mgsin65 - umgcos65 = mrα -------------> gsin65 - ugcos65 = rα (this is the X equation m's cancel) </span>
<span>umgcos65(r) = 0.4mr^2(α) -----------> ugcos65(r) = 0.4r(rα) (This is the moment equation m's cancel) </span>
<span>ugcos65(r) = 0.4r(gsin65 - ugcos65) ( moment equation subbing in X equation for rα) </span>
<span>ugcos65 = 0.4(gsin65 - ugcos65) </span>
<span>1.4ugcos65 = 0.4gsin65 </span>
<span>1.4ucos65 = 0.4sin65 </span>
<span>u = 0.4sin65/1.4cos65 </span>
<span>u = 0.613 </span>
You might be interested in
A FBD of a rocket launching into space should include:
Vladimir [108]

Answer:

Explanation:

the force of the rocket engine pushing it up,  the force of gravity pulling it down,    maybe some force of air resistance as the rocket goes fast,   hmmm    Free Body Diagrams  (FBD)  should have any and all forces on the model,  unless they are negligible . or so slight they really make little difference in the total  outcome.  

3 0
1 year ago
Force F acts between two charges, q1 and q2, separated by a distance d. If q1 is increased to twice its original value and the d
Step2247 [10]
Okay, haven't done physics in years, let's see if I remember this.

So Coulomb's Law states that F = k \frac{Q_1Q_2}{d^2} so if we double the charge on Q_1 and double the distance to (2d) we plug these into the equation to find

<span>F_{new} = k \frac{2Q_1Q_2}{(2d)^2}=k \frac{2Q_1Q_2}{4d^2} = \frac{2}{4} \cdot k \frac{Q_1Q_2}{d^2} = \frac{1}{2} \cdot F_{old}</span>

So we see the new force is exactly 1/2 of the old force so your answer should be \frac{1}{2}F if I can remember my physics correctly.

9 0
2 years ago
Read 2 more answers
The diagram shows a heat engine. In which area of the diagram is unusable thermal energy detected?
Marat540 [252]
Nope, I disagree with the former answer. The answer is definitely Z. <u>W area</u> (boxed with red outline) is represented as the hot reservoir while <u>Z area</u> is the cold reservoir (boxed with blue outline). X area is the heat engine itself and Y area is the work produced from thermal energy from hot reservoir. Typically, all heat engines lose some heat to the environment (based from the second law of thermodynamics) that is symbolically illustrated by the lost energy in the cold reservoir. This lost thermal energy is basically the unusable thermal energy. The higher thermal energy lost, the less efficient your heat engine is. 
7 0
2 years ago
Read 2 more answers
Can you check this? Samantha swam upstream for some distance in one hour. She then swam downstream the same river for the same d
ElenaW [278]
So her speed in still water will be 6mph :)

3 0
1 year ago
Read 2 more answers
The atomic mass of sodium is 0.0230 kg/mole. How many moles are in 1.59 kg of sodium?
Evgesh-ka [11]

Answer:

0.0144..

Explanation:

0.0230/1.59=0.01444....

6 0
1 year ago
Read 2 more answers
Other questions:
  • If you wished to warm 100 kg of water by 15 degrees celsius for your bath, how much heat would be required? (give your answer in
    12·1 answer
  • Janice's mother often lets her 6-month-old baby sit in front of the television, watching episodes of Sesame Street. What is Jani
    5·1 answer
  • A taxi starts from Monument Circle and travels 5 kilometers to the east for 5 minutes. Then it travels 10 kilometers to the sout
    6·2 answers
  • A tennis ball is dropped from 1.20 m above the ground. It rebounds to a height of 1.00 m. (a) with what velocity does it hit the
    7·1 answer
  • A cubical shell with edges of length a is positioned so that two adjacent sides of one face are coincident with the +x and +y ax
    8·1 answer
  • A baseball bat hits a baseball with a force of 100 newtons. What is the force and its direction exerted by the ball on the bat?
    7·1 answer
  • A car is driving east at 120. km/h from Toronto to Ottawa. The distance between the two cities is 425.5 km, how long will it tak
    8·1 answer
  • Quinn is testing the motion of two projectiles x and y by shooting them from a sling shot. What can we say best describes the mo
    14·2 answers
  • A physics teacher pushes an environmental science teacher out of a stationary helicopter without a parachute from a height of 48
    8·1 answer
  • 5. A 1-kg car and a 2-kg car are both released from the top of the same hill and roll down a frictionless track. At the bottom o
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!