A 1000-kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 200 m
What are the magnitude and direction of the net force applied to the car to bring it to rest?
A) 1.00 N north
B) 10.0 × N south
C) 1.00 × N south
D) 1.00 N south
E) 100 N south
Answer: C
You might also like to view...
Energy flows by radiation or convection inside stars but almost never by conduction
Indicate whether the statement is true or false
What is the reason for the seasons on Earth?
a) Earth is cloest to the Sun in July, farthest from the Sun in January b) Earth is tilted with respect to the Sun by about 23.5 degrees c) Earth orbits the Sun more slowly in winter, faster in summer d) Earth rotates more slowly in winter, faster in summer e) Earth's Moon blocks more sunlight from reaching Earth in winter than in summer
If an electron is accelerated from rest through a potential difference of 1 200 V, find its approximate velocity at the end of this process. (e = 1.6 × 10^?19 C; me = 9.1 × 10^?31 kg)
a. 2.5E+7 m/s b. 2.1E+8 m/s c. 2.1E+7 m/s d. 4.2E+7 m/s e. 1.8E+8 m/s
Isaac Newton was able to estimate a value for G, the universal gravitational constant, from the following data: the radius of the Earth is about 6400 km, the average density of rocks is about 5.50 g/cm3, and g = 9.80 m/s2 near the surface of the Earth. What value did Newton obtain for G?