G 11 AP Physics Diagnostic test

A rock at rest is dropped off a cliff and strikes the ground with a velocity of 30 m/s. Find the time it takes to reach the ground. [ g = 9.81m/s²]

Take g= 10 m/ s ², S = u t + ½ g t ², V= u + at,

• 3.06 s

• 0.06 s

• 2.06 s

• 10 s

What is the K.E of a 2 kg baseball if its speed is 40m/s? K.E = ½ m v ²

• 1000 J

• 1000 N m

• 1600 m/s

• 1600 J

During a race on level ground, Nara runs with an average velocity of 6.02 m/s to the east. What distance does Nara cover in 137 s?

• 6.02 m

• 0.043 m

• 825 m

• 22.76 m

A person pushing a stroller starts from rest, uniformly accelerating at a rate of 0.500 m/ s ². What is the velocity of the stroller after it has traveled 4.75 m?

V= u + at, V ² = U ² + 2 a S

• 11.3 m/s

• 2.18 m/s

• 2.38 m/s

• 4.75 m/s

How much work is done on a vacuum cleaner pulled 3.0 m by a force of 50.0 N at an angle of 30.0°above the horizontal? W = F d cos θ

• 150 J

• 130 J

• 0 J

• 45 J

If a car is traveling westward with a constant velocity of 20 m/s, the net force acting on the car is:

• 20 N

• 20 N east

• 0 N

• 20 N west

A force F of strength 20 N acts on an object of mass 3 kg , this force is perpendicular to the object, the displacement of the object is 4 m , find the work done by this force.

W= F cos Ø . d

• 0 J

• 60 J

• 80 J

• 600 J

The net force on the propeller of a 2.5 kg model airplane is 8.0 N. What is the acceleration of the airplane?

• 8.0 N

• 20 N

• 0.1325 N

• 3.2 N

A coin is tossed vertically upward. Its acceleration while it is in the air:

X: increases, Y: decreases, Z: remains constant

• X only

• X then Y

• Y only

• Z only

Calculate the percent error if the experimental value of the density of gold is 18.7 g/cm ³ and the accepted value is 19.3 g/cm ³.

• 3.2 %

• 0.032 %

• 0.0016 %

• 0.06 %