gre 1986

A rock is thrown vertically upward with initial speed v₀...

• The acceleration of the rock is always equal to g.
• The acceleration of the rock is equal to g only at the top of the flight.
• The acceleration of the rock is always less than g.
• The speed of the rock upon return to its starting point is v₀.
• The rock can attain a terminal speed greater than v₀ before it returns to its starting point.

A satellite orbits the Earth in a circular orbit...

• It is an ellipse.
• It is a hyperbola.
• It is a circle with larger radius.
• It is a spiral with increasing radius.
• It exhibits many radial oscillations per revolution.

For blue light, a transparent material has a relative permittivity...

• √3.1 c
• √2.1 c
• c / √1.1
• c / √2.1
• c / √3.1

The equation y = A sin 2π(t/T – x/λ)...

• Amplitude is 2A
• Velocity is in the negative x-direction
• Period is T/λ
• Speed is x/t
• Speed is λ/T

Two small spheres of putty, A and B...

• 1/16 h₀
• 1/8 h₀
• 1/4 h₀
• 1/3 h₀
• 1/2 h₀

A particle is initially at rest at the top of a curved frictionless track...

• 0
• g
• gx/2
• gx/(x² + 4)
• gx²/√(x² + 16)

A 2-kilogram box hangs by a massless rope...

• arctan 0.5
• arcsin 0.5
• arctan 2.0
• arcsin 2.0
• 45°

A 5-kilogram stone is dropped on a nail...

• 10 N
• 100 N
• 1000 N
• 10,000 N
• 100,000 N

A wire of diameter 0.02 meter contains 1×10²⁸ free electrons...

• 0.6×10^-29 m/s
• 1×10^-19 m/s
• 5×10^-10 m/s
• 2×10^-4 m/s
• 8×10^3 m/s

An isolated sphere of radius R contains a uniform distribution of charge...

• A
• B
• C
• D
• E