A stationary 1.67-kg object is struck by a stick. The object experiences a horizontal force given by F = at - bt2, where t is the time in milliseconds from the instant the stick first contacts the object
If a = 1500 N/(ms) and b = 20 N/(ms)2, what is the speed of the object just after it comes away from the stick at t = 2.74 ms? A) 3.3 m/s
B) 22 m/s
C) 3.7 m/s
D) 25 m/s
A
You might also like to view...
Two very small +3.00-?C charges are at the ends of a meter stick. Find the electric potential (relative to infinity) at the center of the meter stick. (k = 1/4??0 = 8.99 × 109 N ? m2/C2 )
A) 0.00 V B) 2.70 × 104 V C) 5.40 × 104 V D) 1.08 × 105 V
At their closest approach, Venus and Earth are 4.20 × 1010 m apart. The mass of Venus is 4.87 × 1024 kg, the mass of Earth is 5.97 × 1024 kg, and G = 6.67 × 10-11 N ? m2/kg2
What is the magnitude of the gravitational force exerted by Venus on Earth at that point? A) 1.10 × 1018 N B) 4.62 × 1028 N C) 5.43 × 1026 N D) 6.30 × 1020 N E) 1.72 × 1019 N
Comets are solid objects
a. True b. False Indicate whether the statement is true or false
Conduction: Two metal rods, one silver and the other gold, are attached to each other end-to-end. The free end of the silver rod is immersed in a steam chamber at 100°C, and the free end of the gold rod in an ice water bath at 0°C. The rods are both 5.0 cm long and have a square cross-section that is 2.0 cm on a side. No heat is exchanged between the rods and their surroundings, except at the ends. How much total heat flows through the two rods each minute? The thermal conductivity of silver is 417 W/m ? K, and that of gold is 291 W/m ? K.
A. 8.2 kJ B. 9.5 kJ C. 12 kJ D. 14 kJ E. 16 kJ