Oquizy

What is the approximate value of acceleration due to free fall near the Earth?

0 m/s² 1 m/s² 10 m/s² 100 m/s²

An electron speeds up from 10 m/s to 30 m/s in 20 s under a constant electric field. Calculate its acceleration, distance travelled, and the force acting on it if its mass is 9.1×10⁻³¹ kg.

a = 1 m/s², s = 200 m, F = 9.1×10⁻³¹ N a = 1 m/s², s = 400 m, F = 9.1×10⁻³¹ N a = 2 m/s², s = 200 m, F = 1.82×10⁻³⁰ N a = 2 m/s², s = 400 m, F = 1.82×10⁻³⁰ N

Which of the following is a correct definition of speed?

Distance travelled per unit time Rate of change of displacement Rate of change of velocity Velocity per unit distance

A particle moves along a circular path of radius 10 m at 15 m/s for 10 s, then accelerates uniformly to 25 m/s over 10 s, and finally slows uniformly to rest in 5 s. Calculate the total distance along the path. Also, calculate the centripetal acceleration at its maximum speed using the formula a = v²/r.

425 m, 62.5 m/s² 450 m, 62.5 m/s² 475 m, 62.5 m/s² 500 m, 62.5 m/s²

The velocity of a car at different times is recorded in the table below. Use the data to calculate the car’s average acceleration and total displacement after 8 seconds.

Average acceleration = 2.0 m/s², Displacement = 60 m Average acceleration = 2.5 m/s², Displacement = 100 m Average acceleration = 2.5 m/s², Displacement = 80 m Average acceleration = 3.0 m/s², Displacement = 120 m

A train is moving at a constant speed of 15 m/s. A passenger standing on the platform begins to run from rest at the exact moment the front of the train passes him. If the passenger accelerates uniformly at 1.5 m/s², how long does it take before the passenger catches up with the back of the train, which is 120 m long?

10 s 12 s 14 s 8 s

Quiz: Physics - Kinematics