Mechanical Systems: Grade 7 Quiz

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Basics of simple machines

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Mechanical Systems: Grade 7 Quiz


Froggy Jumps Mechanical Systems: Grade 7 QuizVersión en línea Basics of simple machines por Katlego Sharon 1 Which best describes a lever’s function in a mechanical system? a To lift a load with less effort b To move a load without effort c To increase the weight of the load 2 a Wheel and axle b Lever c Pulley 3 A pulley system that changes the direction of a force but not its magnitude is called: a Fixed pulley b Block and tackle c Movable pulley 4 The inclined plane reduces the effort needed to move a load by: a Lengthening the distance over which the load is moved b Shortening the distance moved c Increasing the weight of the load 5 In a screw, the inclined plane is wrapped around a: a Cone b Flat plane c Cylinder 6 Gear systems mainly change: a The material of the load b The speed and c The color of the machine 7 Which is an example of a wedge? a A knife b A wheel c A lever 8 What does mechanical advantage describe? a The color of the machine b The number of parts in the system c The factor by which effort is reduced 9 A system with gears 2:1 will: a Double the output speed for the same input b Require more energy c Halve the output speed 10 Which device makes heavy loads easier by combining simple machines? a Electrical circuit b Mechanical system c Hydraulic pump 11 What is the main purpose of a lever in a mechanical system? a To create friction b To increase speed only c To gain a mechanical advantage 12 A pulley system mainly reduces effort by changing what? a Mass of the load b Direction and force needed c Friction in the rope 13 Which simple machine is a wheel with a rope around it used to lift loads? a Inclined plane b Pulley c Screw 14 An inclined plane is best described as a flat surface that a Slopes to raise or lower loads with less effort b Rotates to multiply speed c Is a fixed block of metal 15 Which device is a type of inclined plane wrapped around a cylinder to convert rotational motion into linear motion? a Lever b Screw c Wedge 16 Which statement best describes a wheel and axle? a Two circular parts rotate together to gain speed or force b Two wedges linked to cut materials c A fixed lever with a long arm 17 Gears in a mechanical system mainly a Absorb all loads only b Generate heat c Transmit motion and change speed or direction 18 A lever with the fulcrum between effort and load is a a First-class lever b Third-class lever c Second-class lever 19 The hydraulic system uses what principle to multiply force? a Rigid solids only b Pressure transmitted through fluid c Free-spinning gears 20 Which application is a real-world example of a lever? a A screw-driven drill b A fixed pulley only c A crowbar lifting a heavy object 21 What best defines a mechanical system in everyday tools? a A single rigid part that stays still b A system powered only by electricity without moving parts c A group of moving parts that work together to do work 22 Which simple machine changes the direction of a force most often? a Pulley b Wedge c Screw 23 In a first-class lever, where is the fulcrum located? a At the end of the lever b Away from both effort and load c Between the effort and the load 24 What is the function of an inclined plane? a Increase speed b Reduce the effort needed by increasing distance c Store energy 25 What defines the 'effort arm' of a lever? a Distance from fulcrum to load b Length of the lever only c Distance from fulcrum to where the input force is applied 26 What best describes a gear system? a Two or more wheels with teeth that transmit torque b Two smooth disks that don’t interact c A single wheel spinning in place 27 How does a pulley system typically make work easier? a By heating the load b By providing mechanical advantage and/or changing direction c By increasing the weight of the load 28 Which term best describes a device that uses wheels and axles to transfer motion? a Conductor b Mechanism c Engine 29 What is the formula for work in physics? a Work = force × distance moved in the force direction b Work = mass × velocity c Work = energy ÷ time 30 Name a common mechanical system example in daily life. a A light bulb b A glass bottle without parts c A bicycle

Mechanical Systems: Grade 7 Quiz

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Mechanical Systems: Grade 7 QuizVersión en línea

por Katlego Sharon

Which best describes a lever’s function in a mechanical system?

A pulley system that changes the direction of a force but not its magnitude is called:

The inclined plane reduces the effort needed to move a load by:

In a screw, the inclined plane is wrapped around a:

Gear systems mainly change:

Which is an example of a wedge?

What does mechanical advantage describe?

A system with gears 2:1 will:

Which device makes heavy loads easier by combining simple machines?

What is the main purpose of a lever in a mechanical system?

A pulley system mainly reduces effort by changing what?

Which simple machine is a wheel with a rope around it used to lift loads?

An inclined plane is best described as a flat surface that

Which device is a type of inclined plane wrapped around a cylinder to convert rotational motion into linear motion?

Which statement best describes a wheel and axle?

Gears in a mechanical system mainly

A lever with the fulcrum between effort and load is a

The hydraulic system uses what principle to multiply force?

Which application is a real-world example of a lever?

What best defines a mechanical system in everyday tools?

Which simple machine changes the direction of a force most often?

In a first-class lever, where is the fulcrum located?

What is the function of an inclined plane?

What defines the 'effort arm' of a lever?

What best describes a gear system?

How does a pulley system typically make work easier?

Which term best describes a device that uses wheels and axles to transfer motion?

What is the formula for work in physics?

Name a common mechanical system example in daily life.