Answer:
9.3 g/cm³
Explanation:
First, convert kg to g:
0.485 kg × (1000 g / kg) = 485 g
Density is mass divided by volume:
D = (485 g) / (52 cm³)
D = 9.33 g/cm³
Rounding to two significant figures, the density is 9.3 g/cm³.
With total velocity
, the horizontal component of velocity is

Then the horizontal displacement over the first minute is

Answer: The system internal energy is 40 Joules.
Explanation: As suggested, the formula
should be used. 70 Joules worth of thermal energy are added, and the system does 30 Joules worth of work (energy expenditure).
Answer:
yes inertia would cause you to crash into the windshield in an accident