A Newton
B Joule
C Pascal
D Watt
Explanation: Newton is the SI unit of force, defined as kg m/s2.
A 9.8 m/s2
B 8.9 m/s2
C 10.2 m/s2
D 11.0 m/s2
Explanation: Standard acceleration due to gravity is 9.81 m/s2.
A Speed
B Mass
C Force
D Energy
Explanation: Force has both magnitude and direction, making it a vector.
A F = ma
B F = mv
C F = m/a
D F = v/a
Explanation: Newton\'s Second Law states force equals mass times acceleration.
A 15 kg m/s
B 8 kg m/s
C 1.67 kg m/s
D 0.6 kg m/s
Explanation: Momentum p = mv = 5 x 3 = 15 kg m/s.
A 50 J
B 2 J
C 15 J
D 0.5 J
Explanation: Work W = F x d = 10 x 5 = 50 J.
A KE = 1/2 mv2
B KE = mgh
C KE = mv
D KE = ma2
Explanation: Kinetic energy equals one-half times mass times velocity squared.
A Zero acceleration
B Constant velocity
C Centripetal acceleration
D Tangential acceleration
Explanation: Circular motion requires centripetal acceleration toward the center.
A 11.2 km/s
B 7.9 km/s
C 15.5 km/s
D 3.2 km/s
Explanation: Escape velocity from Earth is approximately 11.2 km/s.
A Opposite to the direction of motion
B In the direction of motion
C Perpendicular to the surface
D Randomly
Explanation: Friction always opposes the relative motion between surfaces.
A Mass of the bob
B Amplitude
C Length of the pendulum
D Weight of the bob
Explanation: Period T = 2pi sqrt(L/g), depends only on length and gravity.
A Equilibrium
B Accelerated motion
C Circular motion
D Projectile motion
Explanation: Zero net force means the object is in translational equilibrium.
Explanation: Impulse has units of Newton-second, equal to change in momentum.
A Maximum
B Negative
C Zero
D Infinite
Explanation: At maximum height, the object momentarily comes to rest.
A 2/5 MR2
B MR2
C 1/2 MR2
D 1/3 MR2
Explanation: Moment of inertia of a solid sphere is 2/5 MR2.
A F = kx2
B F = k/x
C F = kx
D F = mg
Explanation: Hooke\'s Law: F = kx, where k is spring constant and x is displacement.
A Sum of masses
B Inverse of sum
C Product of masses
D Independent of masses
Explanation: F = Gm1m2/r2, proportional to the product of masses.
A 4.9 m
B 9.8 m
C 19.6 m
D 2.45 m
Explanation: h = 1/2 gt2 = 1/2 x 9.8 x 1 = 4.9 m.
A Force x distance
B Work x time
C Work / time
D Force / time
Explanation: Power is the rate of doing work, P = W/t.
A F = ma
B Energy is conserved
C Every action has equal opposite reaction
D Momentum is conserved
Explanation: For every action, there is an equal and opposite reaction.