1) an Object Is Travelling at a Constant Velocity. If That Velocity Is Doubled, the Time

Physics 513Scarsdale High School

Proportionality Review

1) An object is travelling at a constant velocity. If that velocity is doubled, the time to travel

the same distance will be ______

2) Two objects uniformly accelerate to for the same amount of time. The final speed of the

first object is double the final speed of the second object. Compared to the acceleration of

the second object, the acceleration of the first object is ______.

3) Under the influence of the same net force objects of mass 5kg and 10kg accelerate.

Compared to the acceleration of the 5kg object, the acceleration of the 10kg object is

______.

4) If the distance between two masses is doubled, the force of gravity between the two objects

would ______.

5) Two masses are separated by a distance, d. If the first mass is tripled, the second mass is

doubled and the distance between the two is quartered, the force of gravity between the

masses would ______

6) If an objects velocity triples, its momentum ______.

7) An impulse is applied to an object for time “t”. If the same impulse is applied for 4t, the

force experienced by the object will ______.

8) A race car travelling around a track experiences a force “F”.

a) If its mass instantaneously halved (with speed remaining the same), it would experience a

force of ______.

b) If the radius of the track doubled (same mass as original) , it would experience a force of

______.

c) If the speed of the car then doubles, (same mass and radius as original) it would experience a

force of ______.

9) A certain spring gains potential energy “U” when stretched a distance “x”. The same spring

would gain potential energy 2U if stretched a distance ______.

10) A pendulum of length “L” has a period “T” with a 50g bob.

a) If the mass of the bob is increased to 200g, the period will be ______.

b) If the length of the pendulum is increased to 3L, the period will be ______.

11) A spring whose constant is 250 N/m has a period of “T” when a mass oscillates from its end.

The same mass suspended from a spring of 1000 N/m constant will have a period of

______.

12) A space shuttle has an orbital velocity “v” at an altitude of 500km above the Earth. If the

mass of the shuttle quadruples, the new orbital velocity at that altitude will be ______.

13) A space shuttle has an orbital velocity “v” at an altitude of 500km above the Earth. If the

mass of the Earth quadruples, the new orbital velocity at that altitude will be ______.

14) The wavelength associated with a tuning fork is “L”. A tuning fork of twice the frequency in

the same room will have a wavelength of ______.

15) If the speed of a wave is tripled, the frequency of the wave will ______.

16) Current flows through a resistor and dissipates energy at the rate of “P”. If the current

through the same resistor doubles, the rate of energy dissipation will be ______.

17) A wire of a fixed length has a resistance “R”. If the cross sectional is halved, the new

resistance will be ______.

18) Light is shone through a double slit apparatus onto a screen that is L away. The distance

from the central maximum to the first order maximum is “x”.

a) If the distance to the screen is halved, the spacing between maxima would ______.

b) If the frequency of the light is increased by a factor of 3/2, the distance is now______.

19) If the frequency of light is quartered, the energy of the photons associated with this light

would be ______.

Match the following graphs to questions20-20

a) b. c.

e. f.g.

20) The relationship between acceleration and mass for a constant net force. ______

21) The relationship between energy of a photon and wavelength. ______

22) The relationship between time for an object to fall from rest and height of a cliff.______

23) The relationship between the number of identical resistors in series and the circuits’

equivalent resistance. ______

24) The relationship between the force on an electron and the distance from the negatively

charged plate of a parallel plate capacitor. ______

25) The velocity vs time graph for an object moving forward but slowing down ______

26) The relationship between kinetic energy and mass ______

27) The relationship between kinetic energy and speed ______

28) The relationship between the electrostatic force and the distance between charges ______

29) The relationship between the length of a resistor and its resistance ______

30) The distance vs time graph for an object speeding up while going forward ______