mechanics

A vector quantity represents the change in objects location in a certain direction

• a) Distance

• b) Displacement

• c) Velocity

• d) Acceleration

The rate at which an object changes its velocity

• a) Displacement

• b) Acceleration

• c) Velocity

• d) Distance

A racing car increases its speed from 10m/s to 46m/s in 6s, the acceleration equals

• a) 6m/s²

• b) 8m/s²

• c) 10m/s²

• d) 12m/s²

A bus moves with a speed of 24m/s, suddenly the driver presses the break then the car stopped after

3s, the acceleration is

• a) 3 m/s²

• b) 8 m/s²

• c) -8 m/s²

• d) -3 m/s²

a ball was set off with a speed of 4m/s and then the speed decreased in a rate of 2 m/s² , the speed of

the ball after 2s

• a) Zero

• b) 4m/s

• c) 8m/s

• d) 10m/s

When an object falls from a building, the speed of the object after 3s

• a) 9.8 m/s²

• b) 19.6 m/s²

• c)29.4 m/s²

• d)39.2 m/s

A 420 N force acted on an object with a mass 60 kg, what is the acceleration of the object

• a) 3.5 m/s²

• b) 7 m/s²

• c) 14 m/s²

• d) 60 m/s²

A property of objects that resist any change in their state ofmotion

• a) Acceleration

• b) Motion force

• c) Friction

• d) Inertia

What is the magnitude of the resultant displacement of two displacements, the first is 3 Km, the second

is 4 Km with an angle of 90 degree between them?

• A- 1 Km

• B- 5 Km

• C- 7 Km

• D- 12 Km

A skateboard weighs 50 N. If a 30 N horizontal force is applied while moving at a constant velocity

on a street, what is the coefficient of the kinetic friction?

• A- 0.6

• B- 0.9

• C- 1.6

• D- 1.9