physic quiz

if a wave has a speed of 60m/s and a frequency of 20Hz, what is its wavelength.

• 1m
• 2m
• 4m
• 3m

How will the force between 2 objects change if the distance between them increases 3 times

• The force will increase 3 times
• The force will decrease 9 times
• The force will remain the same
• The force will decrease 3 times

A 3 ohm resistor is connected in series with 5 ohm resistor. What is the equivalent resistance of this system?

• 2 ohms
• 5 ohms

• 8 ohms

• 3 ohms

A person start at rest and accelerates at 3 meter per second square for 2 seconds. Solve for the final velocity.

• 3 m/s
• 6 m/s
• 9 m/s
• 12 m/s

Solve for the distance if a car will take to stop if its iinitial velocity is 10 meter per second and its acceleration is -0.3 meter per second square

• 30 meters
• 40 meters

• 35 meters
• 33.33 meters

A 0.55 kg ball is thrown with a speed of 40 meter per second. It is traveling at a height of 1 meter. Solve for the total mechanical energy of the ball

• 800 Joules
• 880 Joules
• 820 Joules
• 840 Joules

Some one drops a 5.5 kg rock from a height of 5 meters. Solve for the velocity of the rock just before it hits the ground

• 25 m/s

• 5.5 m/s
• 27.5 m/s
• 9.9 m/s

Two speherical objects have masses of 10000 kg and 3500 kg. Their center are separated by a distance of 0.8m. Solve for the gravitational attraction between them.

• 0.02 N

• 0.002 N

• 0.2 N
• 0.0025 N