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# Physics

Devonte Bernier

Lvl 10
2021-11-06 18:34:07
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Cards in this guide (26)
What is the mechanical advantage of a simple machine that requires a force of 40 newtons input to lift a 200 newton object

The answer is 5. To find mechanical advantage, divide the force required by the force given.

200/40 = 5

A sailor pulls a 2000 kilogram boat 25 meters along the dock with a rope attached to the boat that makes a 45 degree angle with the dock. How much work is done by the sailor if he exerts a force of 4

7,071 J

A force of 20 N is applied to a 10 kg mass on a level frictionless surface What is the acceleration of the mass

20 N is applied to 10 kg mass.

20 N/10 = 2.

The acceleration of mass is 2.

An isolated system is one which is not subject to any forces

external

A bicycle is an example of what machine

A bicycle is an example of a complex machine, consisting of interacting simple machines.

What factor prevents a machine from operating at 100 percent efficiency

Friction((:

The value of the impulse equals the force x the

The value of the impulse equals the the force times the time.

A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 ms What is the maximum height attained by the ball

10.7

V-cube 7 or megaminx

megaminx

A ramp is 30 meters long and 5 meters high 200 newtons of force must be applied by the mover to push a 1000 newton piano up the ramp

What is the amount of work accomplished by the ramp? - 5000 joules

What is the amount of work done by the mover? - 6000 joules

What is the efficiency of the ramp? - 83%

A force gives a 2.0 kg mass acceleration of 5.0 ms what is the force applied to the mass

The force applied to the mass is ten (10) newtons.

Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force

10 newtons NE. a little more north than east

A golfer tees off and hits a golf ball at a speed of 31 ms and at an angle of 35 degrees How long was the ball in the air

a

A golfer tees off and hits a golf ball at a speed of 31 ms and at an angle of 35 degrees What is the vertical velocity component of the ball

17.8 m/s

A golfer tees off and hits a golf ball at a speed of 31 ms and at an angle of 35 degrees what is the horizontal velocity component of the ball

25.4

What is force applied over a period of time called

impulse

A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 ms What is the vertical velocity component of the ball to the nearest ms

13

What can the moving ball in this illustration be called

projectile

A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor To lift the engine fi

250 newtons

A golfer tees off and hits a golf ball at a speed of 31 ms and at an angle fo 35 degrees How far did the ball travel before hitting the hround

92, or 91.5

A golfer tees off and hits a golf ball at a speed of 31 ms and at an angle of 35 degrees How far did the ball travel before hitting the ground Round the answer to the nearest tenth of a meter

92 or 91.5 meters would be the maximum height.

A golfer tees off and hits a golf ball at a speed of 31 ms and at an angle of 35 degrees How long was the ball in the air Round the answer to the nearest tenth of a second

3.6

A golfer tees off and hits a golf ball at a speed of 31 ms and at an angle of 35 degrees What is the maximum height attained by the ball Round the answer to the nearest meter

16 or 16.1 meters is the maximum height.

Which of these would be true about a 10 kg object on the moon

A 10-kg mass would weigh 98 newtons (22.05 pounds) on earth,

and 16 newtons (3.6 pounds) on the moon.

A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 ms

What term is given to the net figure that results from vector

resultant

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