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التقدم بالاختبار سؤال 1 من 50

Which of the following objects has the greatest inertia?

A locomotive of mass 2,000 kg moving at 30 m/s

A car of mass 1,000 kg moving at 50 m/s

A runner of mass 70 kg moving at 30 m/s

A ball of mass 0.1 kg moving at 50 m/s

سؤال 1

الدرجة 1.00

Standing on tiptoes represents a:

Class 2 lever

Class 1 lever

Class 3 lever

not a lever at all

سؤال 2

الدرجة 1.00

Passengers in a bus lurching forward when it brakes suddenly is explained by:

Newton's Third Law

the law of gravitation

Newton's Second Law

Newton's First Law

سؤال 3

الدرجة 1.00

In a perfectly inelastic collision between a moving body and a stationary one of equal mass, the speed of each after the collision is:

double the speed of the moving body before collision

half the speed of the moving body before the collision

the same speed as the moving body before the collision

zero immediately after the collision occurs

سؤال 4

الدرجة 1.00

An airbag reduces the impact force on the driver by:

reducing the driver's mass during the collision

increasing the driver's speed just before impact

increasing the time of velocity change

stopping the car immediately upon collision

سؤال 5

الدرجة 1.00

A lever is a:

rigid rod that rotates about a fixed point

rod with complex internal gears and teeth

flexible rod that bends easily under heavy load

movable rod that works freely without any fulcrum

سؤال 6

الدرجة 1.00

A tennis racket is an example of a:

Class 3 lever

not a lever at all

Class 1 lever

Class 2 lever

سؤال 7

الدرجة 1.00

A Class 2 lever always provides mechanical advantage because:

the fulcrum is located exactly in the middle

the effort force and load force are always equal

the effort arm is always longer than the load arm

the load arm is always longer than the effort arm

سؤال 8

الدرجة 1.00

The bicep muscle (forearm) in the human body represents a:

not a lever at all

Class 1 lever

Class 3 lever

Class 2 lever

سؤال 9

الدرجة 1.00

The mechanical advantage (M.A.) of a lever equals:

effort ÷ load

effort + load

effort × load

load ÷ effort

سؤال 10

الدرجة 1.00

Two forces of 30 N and 20 N act on a body along the same line of action in opposite directions. The resultant force equals:

50 N

0 N

25 N

10 N

سؤال 11

الدرجة 1.00

A Class 3 lever does not provide mechanical advantage, but it:

increases the amount of applied force significantly

reduces the total distance that the load travels

increases speed and extends the range of motion

only changes the direction of the applied force

سؤال 12

الدرجة 1.00

Objects with greater mass have ______ inertia:

the same inertia as smaller objects

smaller inertia than lighter objects

mass has no relation to inertia at all

greater

سؤال 13

الدرجة 1.00

If a force F acts on a body of mass m and gives it an acceleration a, what happens to the acceleration if the force is doubled while the mass stays the same?

a/2

سؤال 14

الدرجة 1.00

Newton's Second Law is expressed by the equation:

F = m + a

F = m / a

F = m × a

F = a / m

سؤال 15

الدرجة 1.00

Increasing the length of the effort arm in a lever leads to:

reducing the force needed to lift the same load

having no effect on the required lifting force

increasing the amount of force needed to lift the load

automatically reducing the length of the load arm

سؤال 16

الدرجة 1.00

A resultant force of 1 N acts on a body of mass 1 kg. The acceleration produced is:

0.1 m/s²

1 m/s²

10 m/s²

100 m/s²

سؤال 17

الدرجة 1.00

Cruise Control in cars makes the forces acting on the car:

balanced

multiplied

unbalanced

zero

سؤال 18

الدرجة 1.00

Two forces of 20 N act on a body in the same direction. The resultant force equals:

40 N

20 N

0 N

10 N

سؤال 19

الدرجة 1.00

When balanced forces act on a stationary body, the body:

remains stationary

accelerates

moves slowly

stops suddenly

سؤال 20

الدرجة 1.00

A person jumps from the front of a small boat and the boat moves backward. This is explained by:

Newton's Third Law

Newton's Second Law

the law of gravitation

Newton's First Law

سؤال 21

الدرجة 1.00

In a Class 2 lever, the fulcrum is located:

outside the lever and does not affect motion

always in the middle between effort and load

at one end of the lever, with the load between the fulcrum and the effort

between the effort and the load, with the effort between them

سؤال 22

الدرجة 1.00

The law that explains how a rocket is launched in the direction opposite to the ejected burning gases is:

Newton's First Law

Newton's Third Law

Newton's Second Law

The Law of Universal Gravitation

سؤال 23

الدرجة 1.00

A weight of 20 N is hung 15 cm to the right of the fulcrum, and a weight of 30 N is hung to the left at distance x. The value of x equals:

15 cm

20 cm

30 cm

10 cm

سؤال 24

الدرجة 1.00

Pliers are an example of a:

Class 1 lever

Class 2 lever

Class 3 lever

not a lever at all

سؤال 25

الدرجة 1.00

In an air-hockey experiment, the puck continues to move a long distance because:

the puck is very heavy and has high inertia

friction between the puck and the table is reduced by the air layer

there is no gravity acting on the puck

the applied force increases steadily with time

سؤال 26

الدرجة 1.00

A drone (unmanned aerial vehicle) moves upward because:

the motors pull air upward in a direct manner

gravity is reversed and points upward instead

the drone is lighter than the surrounding air

the downward push of air is matched by the air pushing the drone upward

سؤال 27

الدرجة 1.00

A uniform metal rod AB, length 60 cm and weight 5 N, rotates about point A. A newton meter is attached at end B to balance the rod horizontally. What is the newton meter reading?

5 N

8 N

10 N

2.5 N

سؤال 28

الدرجة 1.00

What is the magnitude of the resultant force needed to move a car of mass 1,200 kg with an acceleration of 3 m/s²?

3,600 N

3,000 N

400 N

1,200 N

سؤال 29

الدرجة 1.00

Inertia is the property of bodies to:

resist any change in their state of motion

generate their own force

change their speed quickly

stop automatically

سؤال 30

الدرجة 1.00

When the electric current to a rotating fan is cut off, its blades continue to spin for a while due to

magnetism

inertia

gravity

air friction

سؤال 31

الدرجة 1.00

A cargo cart accelerates less when it is:

empty with the same applied force

heavily loaded with the same applied force

empty with a greater applied force

loaded with a greater applied force

سؤال 32

الدرجة 1.00

A wheelbarrow is an example of a:

Class 4 lever

Class 2 lever

Class 3 lever

Class 1 lever

سؤال 33

الدرجة 1.00

According to Newton's Third Law, the action force and reaction force act on:

two different bodies

more than two different bodies

the same exact body

no at all physical body

سؤال 34

الدرجة 1.00

A lever provides mechanical advantage (M.A. > 1) when:

both the effort arm and load arm are equal

the effort arm is longer than the load arm

the load arm is longer than the effort arm

there is no relation between the arms and MA

سؤال 35

الدرجة 1.00

A tower crane (construction crane) belongs to:

compound machines

rotary machines

Class 1 simple levers

simple machines

سؤال 36

الدرجة 1.00

A lever is in equilibrium when:

effort × effort arm = load × load arm

the effort moment is greater than the load moment

the effort equals the load in magnitude

the effort arm equals the load arm

سؤال 37

الدرجة 1.00

A lemon squeezer is an example of a:

Class 1 lever

Class 2 lever

Class 3 lever

not a lever at all

سؤال 38

الدرجة 1.00

The seat belt in a car works according to Newton's:

First Law

Law of Universal Gravitation

Third Law

Second Law

سؤال 39

الدرجة 1.00

When the mass of a moving body increases while the applied force remains constant, its acceleration:

decreases

increases

stays the same

becomes zero

سؤال 40

الدرجة 1.00

The Flyboard (water-propelled hoverboard) works on the principle of:

inertia

balanced forces

action and reaction

universal gravitation

سؤال 41

الدرجة 1.00

When unbalanced forces act on a stationary body, the body moves in:

the direction of the resultant force

a completely random direction with no pattern

the direction opposite to the force

it does not move at all from its position

سؤال 42

الدرجة 1.00

The human head represents a:

not a lever at all

Class 3 lever

Class 1 lever

Class 2 lever

سؤال 43

الدرجة 1.00

A moving body collides with a stationary one of equal mass. The moving body stops and the stationary one moves at the same speed. This collision is:

has no type

semi-elastic

inelastic

elastic

سؤال 44

الدرجة 1.00

The SI unit of force is:

m/s²

سؤال 45

الدرجة 1.00

Newton's First Law is also known as:

The law of inertia

The law of gravitation

The law of action and reaction

The law of acceleration

سؤال 46

الدرجة 1.00

Which of the objects X, Y, and Z below is subject to a non-zero resultant force?

Z and Y only

X, Y, and Z

Y only

X only

سؤال 47

الدرجة 1.00

In a Class 1 lever, the fulcrum is located:

outside the lever completely

between the effort and the load

at the point where the load is applied

at the point where the effort is applied

سؤال 48

الدرجة 1.00

Simple machines are tools that:

facilitate work and reduce effort, or change the direction of force

generate mechanical energy directly from the surrounding air

multiply the total amount of energy in a closed system

work automatically without needing any external force

سؤال 49

الدرجة 1.00

If a car has a mass of 1,000 kg and a driving force of 1,300 N acts on it (ignoring other forces), its acceleration equals:

1.3 m/s²

130 m/s²

0.13 m/s²

13 m/s²

سؤال 50

الدرجة 1.00

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