1answer.
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
8090 [49]
3 years ago
13

How many pounds of force must a guardrail’s top rail be able to withstand? A. 150 lbs. B. 200 lbs. C. 400 lbs. D. 5,000 lbs.

Physics
2 answers:
oksian1 [2.3K]3 years ago
7 0
It has to be atleast 300 lbs which is b
Greeley [361]3 years ago
3 0
At least 200 pounds.
hope this one helps
You might be interested in
The lubrication of bone joints is a subject of ongoing medical research. Two bones connected at a joint do not touch. The bones
maks197457 [2]

The question is incomplete. The complete question is :

To measure the effective coefficient of friction in a bone joint, a healthy joint (and its immediate surroundings) can be removed from a fresh cadaver. The joint is inverted, and a weight is used to apply a downward force F⃗ d on the head of the femur into the hip socket. Then, a horizontal force F⃗ h is applied and increased in magnitude until the femur head rotates clockwise in the socket. The joint is mounted in such a way that F⃗ h will cause clockwise rotation, not straight-line motion to the right. The friction force will point in a direction to oppose this rotation.

Draw vectors indicating the normal force n⃗  (magnitude and direction) and the frictional force f⃗ f (direction only) acting on the femur head at point A.

Assume that the weight of the femur is negligible compared to the applied downward force.

Draw the vectors starting at the black dot. The location, orientation and relative length of the vectors will be graded

Solution :

The normal force represented by N is equal to the downward force, $F_d$ which is equal in magnitude but it is opposite in direction.

Also the frictional force acts always to oppose the motion because the bone starts moving in a clockwise direction. The frictional force that will be applied to the right direction so that the movement or the rotation at A is opposed.  

5 0
3 years ago
What is the volume of 27 g of aluminium?
Scilla [17]

Answer:10cm3

Explanation:Volume Al = (27g Al)/(2.70g/cm3 Al) = 10cm3 Al. So, 27g of Al has a volume of 10cm3. *

8 0
3 years ago
Read 2 more answers
True or false? All waves need a medium in order to travel
Art [367]
That's false.  Mechanical waves (like sound and ocean waves) do
need a medium to travel in, but electromagnetic waves (like radio
and light) don't.
4 0
3 years ago
Read 2 more answers
A basketball is shot at 14.0 m/s at a 65.0 degree angle. What is the magnitude only (no direction) of the velocity of the ball 2
Alex787 [66]

Answer:

10.4 m/s

Explanation:

I just know it's right!

8 0
3 years ago
What is the mass of a baseball thrown at 25 m/s resulting in a momentum
ArbitrLikvidat [17]

250kg

                                        would have momentum that is being caried by the impact of the trow                                                                                                                    

8 0
2 years ago
Other questions:
  • Center of low pressure are called
    9·2 answers
  • A 250 mL sample of nitrogen(N2) has a pressure of 745 mm Hg at 30 C.What is the mass of nitrogen?
    5·1 answer
  • When Bob needs to send Alice a message with a digital signature, whose private key is used to encrypt the hash?
    10·1 answer
  • Which of the following would describe a length that is 2.0×10^-3 of a meter? a: 2.0 kilometers
    14·1 answer
  • WILL MARK BRAINLY
    10·2 answers
  • What is the function of a resistor in a circuit? How does it affect the amount of charge that flows? How does it affect the rate
    13·1 answer
  • Unpolarized light of intensity 30 W/cm2 is incident on a linear polarizer set at the polarizing angle θ1 = 22 ∘. The emerging li
    5·1 answer
  • A hydraulic machine has a small piston and a larger piston. Explain how a hydraulic machine multiplies force? What happens to th
    7·1 answer
  • How did she change the circuit?
    11·2 answers
  • If a rock is thrown vertically upward from the surface of Mars with velocity of 20 m/s, its height (in meters) after t seconds i
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!