Kuiz Fizik Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 1 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

A coconut with a mass of 2.0 kg is falling with an acceleration of $9.0 m s^{-2}$ . Given that the gravitational acceleration $g = 9.81 m s^{-2}$ , calculate the magnitude of the air resistance acting on it.

1.62N

37.62N

19.62N

18.0N

None

The graph of force (F) versus extension (x) for a spring is plotted. What does the gradient of this graph represent?

The work done in stretching the spring

The spring constant, k

The maximum force the spring can withstand

The extension per unit force

None

An object is subjected to two forces, 8 N and 6 N, acting in opposite directions along the same line. What is the magnitude and direction of the resultant force?

14 N in the direction of the 8 N force

2 N in the direction of the 6 N force

2 N in the direction of the 8 N force

10 N in the direction of the N force

None

A block of weight 50 N is at rest on a smooth inclined plane at an angle of 40∘ to the horizontal. A frictional force, F R, prevents it from sliding down. What is the magnitude of this frictional force?

50sin40∘ N

50cos40∘ N

50tan40∘ N

50 N

None

The elastic potential energy stored in a spring is 0.4 J when it is extended by 5 cm. What is the force required to cause this extension?

0.08 N

8 N

2 N

16 N

None

Which of the following describes the property of 'elasticity'?

The ability of a material to resist scratching and abrasion

The ability of an object to deform permanently under an applied force.

The ability of a material to be stretched into a thin wire

The ability of an object to return to its original shape and size after a deforming force is removed

None

What is the primary condition for an object to be in a state of equilibrium of forces?

The object must be stationary

The forces acting on it are all equal in magnitude

There are no forces acting on the object

The resultant force acting on the object is zero

None

Hooke's Law states that the extension of a spring is directly proportional to the applied force. What is the condition under which this law is valid?

Only if the force applied is a pulling force

Under all conditions of stretching or compression

As long as the spring is made of metal

If the elastic limit is not exceeded

None

Which of the following factors does NOT affect the spring constant of a coil spring?

The original length of the spring

The material the spring is made from

The thickness of the spring’s wire

The gravitational field strength where the spring is used

None

10.

A car is moving at a constant velocity of 20 m s−1. The engine provides a forward thrust of 1500 N. What is the magnitude of the total resistive force (air resistance and friction) acting on the car?

Less than 1500 N

0 N

Greater than 1500 N

1500 N

None

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