When a drag strip vehicle reaches a velocity of 60 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight line path is a constant -6.0 m/s2 . What displacement does it undergo during this deceleration period?
a. 120 m
c. 320 m
b. 300 m
d. 240 m
B
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One light-hour is the distance light travels in one hour. The speed of light is about 300,000 km/s . How far is 1 light-hour?
A) 300 thousand km (300,000, or 3 × 105 km) B) 1.08 billion km (1,080,000,000, or 1.08 ×109 km) C) 18 million km (18,000,000, or 1.8 × 107 km) D) 9.46 trillion km (9,460,000,000,000, or 9.46 × 1012 km)
Which force has the smallest magnitude?
A. 
B. 
C. Both and (which are equal)
D.
E. 
Suppose a car has a 100 000-mile 10-year warranty on its wheels and axles. How may turns will the wheels of 0.70-m diameter make if both the mileage and time warranties run out simultaneously and what will be the average angular velocities of the wheel? Assume that a mile = 1.6 × 10^3 m and that a year is 3.16 × 10^7 s
a. 7.3E+7, 14 rad/s b. 2.3E+8, 1.4 rad/s c. 3.5E+8, 1.4 rad/s d. 7.3E+7, 1.4 rad/s e. 2.3E+8, 14 rad/s
A 500-kg cannon fires a 4.0-kg projectile with a velocity of 500 m/s relative to the ground. What is the recoil speed of the cannon?
A) 1.0 m/s B) 2.0 m/s C) 4.0 m/s D) 6.0 m/s E) 8.0 m/s