Question

A block of mass 3.00 kg is pushed up against a wall be a force that...

A block of mass 3.00 kg is pushed up against a wall be a force that makes an angle of 50° with the horizontal. The coefficient of static friction between the wall and the block is 0.25. (a) What is the force required to keep the block from falling? (b) What is the maximum force that can be applied before the block slides upward?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

(a)

the force required to keep the block from falling is the minimum force

the force of friction and weight must be opposite.

mg - f = psin

mg - uspcos = psin

p = mg / ( sin + us cos )

p = 3 * 9.8 / ( sin 50 + 0.25 * cos 50)

p = 31.7 N

----------------------------------

(b)

maximum force is when both friction and weight are in same direction

mg + uspcos = psin

p = mg / ( sin - us cos )

p = 3 * 9.8 / ( sin 50 - 0.25 * cos 50)

p = 48.6 N

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A horizontal force of 60.0 N is applied to a 3.00 kg block as the block...
A horizontal force of 60.0 N is applied to a 3.00 kg block as the block slides a distance of 0.500 m up a ramp. The ramp is inclined at an angle of 30.0◦ and the coefficient of kinetic friction between the ramp and the block is 0.600. If the block is initially at rest, how fast is it moving at the end of the displacement? Please make answer very detailed
A 5.50 kg block is pressed against a vertical wall by a force (→F), as shown...
A 5.50 kg block is pressed against a vertical wall by a force (→F), as shown in the figure below. The coefficient of static friction between the block and the wall is 0.32 and the directional angle θ for the force is 36.0°. Determine the magnitude of the force (→F) when the block is about to slide down the wall.
A box of mass m = 3 kg is pushed against a vertical wall, with a...
A box of mass m = 3 kg is pushed against a vertical wall, with a force that gets weaker over time, Fa = 10 - t N. After 10 seconds, Fa remains 0 Newtons (the force does not become negative). The coefficient of static friction ?s = 0.7 and ?k = 0.4
Part 1) A 1.0 kg block is pushed 2.0 m at a constant velocity up a...
Part 1) A 1.0 kg block is pushed 2.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 29.0 ◦ with the horizontal, as shown in the figure. The acceleration of gravity is 9.81 m/s 2. Drawing not to scale. If the coefficient of kinetic friction between the block and the wall is 0.20, find a) the work done by the force on the block. Answer in units of J. Part...
A stationary box of mass 9.5 kg is being pushed by a force 12.9 N at...
A stationary box of mass 9.5 kg is being pushed by a force 12.9 N at an angle θ = 31.2o with respect to the horizontal. The coefficient of static friction between box and surface is μs= 0.30. Calculate the magnitude of the MAXIMUM POSSIBLE static friction force which can be generated, to 2 s.f.
A block of mass 20 kg on a horizontal surface where uk = 0.4is pushed against...
A block of mass 20 kg on a horizontal surface where uk = 0.4is pushed against an initially relaxed spring that has a force constant k = 100 N/m, compressing it 1.50 meters. It is then released, what is the maximum velocity of the mass? Hint the maximum velocity occurs before the relaxed spring equilibrium point.
A 3.00 kg mass is pushed against a spring and released. If the spring constant of...
A 3.00 kg mass is pushed against a spring and released. If the spring constant of the spring is 7500 N/m and the spring is compressed 10.0 cm. (a) What is the energy stored in the compressed spring? (b) What is the maximum speed ?0 of the mass? (c) The mass then travels across a rough surface and then up a smooth ramp. The speed at the beginning of the ramp is ?1 = 4.00 m/s. What is the work...
A block of mass 16.31 kg is initially held at rest on a 25.94 degree incline....
A block of mass 16.31 kg is initially held at rest on a 25.94 degree incline. The coefficient of static friction is 0.3472 and the coefficient of kinetic friction is 0.2083. A) Find: mg, FDH, FN, fsmax, and fk and express them rounded to the nearest full Newton. B) What is the minimum force up the ramp that will keep the block from sliding down? C) What is the maximum force up the ramp you can exert before the block...
A 65.0 kg box is pushed up a ramp inclined at 27.0∘. The applied force (F)...
A 65.0 kg box is pushed up a ramp inclined at 27.0∘. The applied force (F) is horizontal and causes the block to move at a constant speed. Determine the magnitude of the applied force, a. when the ramp is frictionless. b. when the coefficient of kinetic friction is 0.200.
A box with mass of 5 kg is pushed with a force of 15 N on...
A box with mass of 5 kg is pushed with a force of 15 N on a rough horizontal floor. Find the friction force (assume that the static friction coefficient µs=0.4 ). Please Solve As soon as Solve quickly I get you thumbs up directly Thank's Abdul-Rahim Taysir
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT