PHYSICS HIGH SCHOOL

A Block slides down an incline that makes an angle of 30? with the horizontal direction. The coefficient of kinetic friction between the incline and the block is µk = 0.3i) Determine the acceleration of the block.
ii) The block starts at rest from a height of 8m above the ground. What is the speed of the block when it reaches the bottom of the incline.

Answers

Answer 1

Answer:

Answer:

Acceleration = 2.35 m/ $s^(2)$

Speed = 8.67 m/s

Explanation:

The coefficient of friction , u =0.3

The angle of incline = 30°

The two forces acting on block are weight and friction.

weight along the incline = mg cos60° = $(mg)/(2)$ = 0.5 mg

Friction along incline = umg cos30° = mg $0.3* (√(3))/(2)$

Friction along incline = 0.26 mg

Net force acting on the weight = (0.5 - 0.26) mg = 0.24 mg

Acceleration = $(net force)/(mass)$ = 0.24 g = 2.35 m/ $s^(2)$

The height of incline = 8 m

Length of the inclined edge = 16 m

$v^(2)=u^(2)+2as$

$v^(2)= 2* 0.24 * 9.8* 16$

v= 8.67 m/s

Related Questions

A(n) _____ is the smallest complete part of a compound.A. ion B. atom C. element D. molecule
At a certain location, the earth's magnetic field has a magnitude of 5.7×10−5 t and points in a direction that is 73 ∘ below the horizontal. part a find the magnitude of the magnetic flux through the top of a desk at this location that measures 81 cm by 85 cm
The main difference between speed and velocity involves A. gravity.B. distance.C. weight.D. direction.
What is the definition of luminosity
What is a dwarf planet?

A grasshopper jumps and accelerates at 4.5 m/s2. If its legs exert a force of 0.062 N during the jump, what is the mass of the grasshopper?

Answers

Answer:

0.014 kg

Explanation:

trust me its right i took the assessment and got 100%. :)

Evan drew a diagram to illustrate radiation what do the arrows represent

A. Gases missing with particles

B. liquid moving through a vacuum

C. moving Particles

D. Electromagnetic waves

Answers

The correct answer to the question is D. Electromagnetic waves.

EXPLANATION:

As per the diagram, the radiations are emitted by sun is coming to earth.

The radiations coming from sun is electromagnetic in nature. It does not require any medium for its propagation. It travels a long distance in vacuum or space to reach earth.

It contains both electric field and magnetic field which are perpendicular to each other and also normal to the direction of propagation. The diagram shows that the wave is moving in the form of crests and troughs.

If we consider the wave nature of radiation, then it is one way of transportation of thermal energy from sun to earth which is known as radiation.

Hence, the arrows drawn in the figure is electromagnetic waves.

The answer would be D, electromagnetic waves

How do I calculate the equivalent resistance?

Answers

you need to specify between which nodes.

Rab = R1+R5+R3 ; R2,R4 are ignored because CD is opened curcuit.

Rbd = R3 + R4

anyway, the cuircuit seems incomplete

Sęòhs hadoí jdaló, 2jò

Two technicians are discussing hydraulics. Technician A says that if pistons of the same size are used, motion and force can be increased or decreased. Technician B says that if a small piston acts upon a larger piston, the force of the larger piston will increase, but the distance it travels will decrease. Who is correct? A. Technician B only B. Technician A only C. Both Technician A and B D. Neither Technician A nor B