A 10N falling encounters 10N of air resistance (upward force). The net force on the object is:

You are in a spacecraft moving at a constant velocity. The front thruster rocket fires incorrectly, causing the craft to slow do

Alchen [17]

Answer:

It continue to move forward at a constant velocity which will be slower than before the front thruster was fired.

Explanation:

Before the front thruster was fired, the spacecraft was already moving at a particular velocity.

After the malfunction, the front thruster is fired and then the force exerted by that front thruster slows the spacecraft down, as we are told.

By using the rear thruster to exert a force equal to that from the front thrusters, a force equal in magnitude to that of the front thrusters is added, cancelling out the effect of the front thrusters. Because the spacecraft is already moving at a slower speed at this point compared to the beginning, it continues to move at that speed.

8 0

4 years ago

A uniform solid sphere rolls down an incline. A) What must be the incline angle (deg) if the linear acceleration of the center o

Nonamiya [84]

Answer:

a) θ = 12.12°

b) equal to 0.21g

Explanation:

Solution:-

Declare variables:

- The mass of solid sphere, m

- The inclination angle, θ

- The linear acceleration a down the slope of the solid sphere is a = 0.21g

Where, g: The gravitational acceleration constant.

- The component of weight of solid sphere directed down the slope is given by:

Ws = m*g*sin ( θ )

- Apply Newton's second law of motion down the slope, state:

F_net = m*a

- The only net force acting on the solid sphere is the Weight. So, the equation of motion in the coordinate axis ( down the slope ).

Ws = m*a

m*g*sin ( θ ) = m*0.21*g

- Solve for inclination angle ( θ ):

sin ( θ ) = 0.21

θ = arcsin ( 0.21 )

θ = 12.12°

- If a friction-less block of mass ( m ) moves down the same slope then block has weight component down the slope as:

Wb = m*g*sin ( θ )

- Apply Newton's second law of motion down the slope, state:

F_net = m*a

- The only net force acting on the solid sphere is the Weight. So, the equation of motion in the coordinate axis ( down the slope ).

Ws = m*a

m*g*sin ( θ ) = m*a

- Solve for linear acceleration ( a ):

g*sin ( θ ) = a

a = sin ( 12.12 ) * g

a = 0.21g

Answer: The acceleration is independent of mass and only depends on the inclination angle θ.

7 0

4 years ago

What is the pressure of a 300 lb. object on a 100 sq. in. area?

denis23 [38]

Answer:

D. 3 psi

Explanation:

Pressure is defined as force acting per unit area and is numerically expressed as:

$P= \frac {F}{A}$

where P represent pressure, F is force and A is area where the force acts. Substituting 300 lb for force and 100 sq.in for area then pressure,

$P=\frac {300 lb}{100 in^{2}}= 3 \ psi$

Therefore, from the choices given, option D, 3psi is the right choice.

3 0

3 years ago

What is the function of mitochondria? BRAINLIEST WILL BE GIVEN PLS HELP

Citrus2011 [14]

Answer:

The Mitochondria generates most of the chemical energy needed to power the cell's biochemical reactions.

Explanation:

I studied the body organisms 2 years ago.

7 0

3 years ago

Read 2 more answers

Two cyclists, 50 miles apart, start riding toward each other at the same time. One cycles 4 times as fast as the other, and they

Bond [772]

Answer:speed of slower cyclist is 5 mph

Explanation:

Given

Distance between two cyclist is 50 miles

One cycle is 4 times fast as other

Speed of slower cyclist is r miles per hour

speed of faster cyclist is 4 r

they meet after t=2 hr

Distance traveled by fast cyclist is $x=2\times 4r$

Distance traveled by slower cyclist is $y=2\times r$

$x+y=50$

$2\times 4r+2\times r=50$

$8r+2r=50$

$10r=50$

$r=5 mph$

$4 r=20 mph$

speed of slower cyclist is 5 miles per hour

3 0

3 years ago