Physics Elevator Questions

A person is standing in an elevator. In which of the following cases will the person feel lighter?

• The elevator speeds up while moving upward

• The elevator slows down while moving upward

• The elevator moves up with a uniform speed

• The elevator moves down with a uniform speed

A 60-kg student stands on a scale in an elevator. At the instant the elevator is moving upward with an acceleration of 4 m/s², what is the reading on the scale?

• 480 N

• 600 N

• 720 N

• 840 N

Fatima is riding an elevator while holding a spring scale with a 3 kg mass suspended from it. At a certain moment, the scale reads 40 N. What is the elevator's acceleration at that moment? (On Earth, g = 10 N/kg)

• 2 m/s² downward

• 6 m/s² downward

• 6 m/s² upward

• 2 m/s² upward

A 45 kg girl stands on a scale in an elevator. Find the reading of the scale if the elevator is speeding up while moving upward at a constant rate of 3 m/s².

• 450 N

• 480 N

• 540 N

• 600 N

An object in equilibrium has three forces, F₁ of 40 N, F₂ of 60 N, and F₃ of 80 N acting on it. What is the magnitude of the resultant of F₁ and F₂?

• 20 N

• 40 N

• 60 N

• 100 N

A car travels 6 km east then shifts in place by 50° south to travel another 8 km. Find the magnitude of the car's total displacement from its starting position.

• 10.3 km

• 12.5 km

• 14.0 km

• 15.2 km

A net force of magnitude 'F' accelerates a mass 'm' with an acceleration of magnitude 'a'. If the same net force is applied to another mass of 4m, then the magnitude of the acceleration will be:

• 4a

• a/4

• a/2

• a

You pull horizontally on a 60-kg crate with a force of 500 N to the right while a frictional force of 300 N acts to the left. What is the acceleration of the crate?

• 2 m/s² to the right

• 3.33 m/s² to the right

• 5 m/s² to the left

• 8 m/s² to the right

A 70 kg mass is suspended motionless from two inextensible and light cables. If the magnitude of the tension in cable 1 (T₁) is 90 N, what is the magnitude of the tension in cable 2 (T₂)?

• 70 N

• 90 N

• 700 N

• 100 N

Ahmed pulls a 20 N box using a light and inextensible string with a force of magnitude F. Find F.

• 10 N

• 20 N

• 25 N

• 30 N