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noname [10]
3 years ago
11

What is the efficiency of a ramp if the input work is 96 J and the output work is 24 J?

Physics
1 answer:
iren2701 [21]3 years ago
7 0

Answer:It is 200

Explanation: GOOGLE

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Two equal forces are applied to a door. The first force is applied at the midpoint of the door, the second force is applied at t
Orlov [11]

Answer:

D) the second at the doorknob

Explanation:

The torque exerted by a force is given by:

\tau = Fdsin \theta

where

F is the magnitude of the force

d is the distance between the point of application of the force and the centre of rotation

\theta is the angle between the direction of the force and d

In this problem, we have:

- Two forces of equal magnitude F

- Both forces are perpendicular to the door, so \theta=90^{\circ}, sin \theta=1

- The first force is exerted at the midpoint of the door, while the 2nd force is applied at the doorknob. This means that d is the larger for the 2nd force

--> therefore, the 2nd force exerts a greater torque

4 0
3 years ago
The magnitude of the momentum of an object is the product of its mass m and speed v. If m = 3 kg and v = 1.5 m/s, what is the ma
Oliga [24]

Answer:

Momentum, p = 5 kg-m/s

Explanation:

The magnitude of the momentum of an object is the product of its mass m and speed v i.e.

p = m v

Mass, m = 3 kg

Velocity, v = 1.5 m/s

So, momentum of this object is given by :

p=3\ kg\times 1.5\ m/s

p = 4.5 kg-m/s

or

p = 5 kg-m/s

So, the magnitude of momentum is 5 kg-m/s. Hence, this is the required solution.

5 0
3 years ago
What is the speed of a wave if it is 8 meters long and has a frequency of 3 hz?
Lesechka [4]
What is the speed of a wave if it is 8 meters long and has a frequency if 3 hz?
 
the answer is 24 m/s 

7 0
3 years ago
Keisha analyzes this circuit diagram.
Mazyrski [523]
Component ' W ' is the standard schematic symbol for a switch.

The short line between the two circles can be shown straight,
like it is now, when the switch is 'closed' and current can flow.

Or, it can also be drawn slightly tilted, so it's not touching one
of the circles.  In that case, the switch is 'open', no current can
flow through it, and the whole circuit is shut down.
9 0
4 years ago
Read 2 more answers
The feeling of being pushed into your seat when a car suddenly accelerates is an example of intertia
taurus [48]

Answer:

it is true

Explanation:

because the backward force you feel when your car accelerates is caused by your body's inertia

8 0
3 years ago
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