The force exerted by the machine is the ____

Draw two unique free body diagrams that each show a net force of 30 N to the left.

Reil [10]

Answer:

just trace a picture of it.

7 0

4 years ago

Two plastic projectiles have the same mass M and speed V when they hit a glass window pane at a right angle. The interaction bet

Liono4ka [1.6K]

Answer:

b. Projectiles A & B have the same likelihood of breaking the glass since they have the same initial momentum

.

c. Projectile A has the greater likelihood of breaking the glass since its momentum change is larger.

Explanation:

for option b, the two projectiles have the same initial mass and velocity, hence they posses the same amount of momentum that if sufficient enough could break the glass.

for option c, projectile A changes direction, maintaining the same speed v. Its momentum changes from from mv to -mv, since its speed changed direction.

the difference in momentum becomes

Δp = -mv - mv = -2mv

this is twice the initial momentum.

projectile B changes momentum from mv to 0

Δp = 0 - mv = -mv.

this is half of the final momentum of projectile A.

Also we know that force is proportional to to the rate of change of momentum, which is greater in projectile A, therefore projectile A impacts more force on the glass. Projectile A therefore has the greater likelihood of breaking the glass since its momentum change is larger.

6 0

3 years ago

A scientific law tells us what nature will do under certain conditions.<br> True<br> False

sergij07 [2.7K]

Hello There!

This Is A "True" Statement.

<em>A scientific law tells us what nature will do under certain conditions.</em>

6 0

3 years ago

Causing a collision while speeding puts points on your license

Marizza181 [45]

Yes, I believe it will put points on your license. I think in some cases you will get your license revoked

5 0

3 years ago

Read 2 more answers

The battery charger for an mp3 player contains a step-down transformer with a turns ratio of 1:38, so that the voltage of 120 v

matrenka [14]

Transformer contains two coils: primary and secondary. They allow change of voltage to lower or higher value. In first case we have step-down and in second case we have step-up transformer.
Formula used for transformer is: $\frac{N_{1} }{N_{2}} = \frac{V_{1}}{V_{2}}$

Where:N1 = number of turns on primary coilN2 = number of turns on secondary coilV1 = voltage on primary coilV2 = voltage on secondary coil
In a step-down transformer primary coil has more turns than secondary coil. So the ratio 1:38 means that for each turn on secondary coil we have 38 turns on primary coil.
We can solve the equation for V2: $V_{2} = \frac{ V_{1}* N_{2} }{ N_{1} } \\ V_{2} = \frac{ 120* x }{ 38x} } \\ V_{2} = 3.16V$

Secondary coil provides voltage of 3.16V.

7 0

4 years ago

The force exerted by the machine is the _____