Forces and Motion

According to Newton's first law, an object at rest will remain at rest unless acted upon by what?

• external force

• stationary force

• inertia force

• internal force

What is the SI unit of force?

• Volt

• Newton (N)

• Joule

• Watt

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Which type of force is responsible for keeping an object on a table?

• Friction force

• Normal force

• Gravitational force

• Magnetic force

What is the formula to calculate speed?

• Speed = Distance / Time

• Speed = Distance x Time

• Speed = Time / Distance

• Speed = Distance + Time

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What is the difference between speed and velocity?

• Speed is a vector quantity, velocity is a scalar quantity.

• Speed and velocity are the same thing.

• Speed is scalar, velocity is vector.

• Velocity is measured in kilometers per hour, speed in meters per second.

What is the acceleration of an object if its velocity changes from 5 m/s to 10 m/s in 2 seconds?

• 2 m/s^2

• 5 m/s^2

• 3.5 m/s^2

• 7.5 m/s^2

What is the force required to keep an object moving at a constant speed?

• Infinite

• Variable

• Negative

• Zero

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According to Newton's third law, for every action, there is an equal and opposite what?

• reaction

• opposite reaction

• equal force

• opposite effect

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What is the force that resists the motion of two surfaces in contact?

• attraction

• slipperiness

• repulsion

• friction

What is the acceleration of an object if a force of 10 N is applied to an object of mass 5 kg?

• 5 m/s^2

• 3 m/s^2

• 8 m/s^2

• 2 m/s^2

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