1. A loaf of bread of volume 2500 cm has a density of 0.15 g/cm. If the bread is crushed in the bottom of a grocery bag into a volume of 4000.0 cm. Calculate the density of the crushed bread to the nearest hundredth. 2. A man drove a truck at an average speed of 80.0 km/h for 150 km. It started raining and the man slowed down to at an average speed of 65.0 km/h for 4 hours. What was the average speed for the entire trip? 3. a. An object of mass 50 kg moves with a horizontal velocity of 20 m/s. Calculate i. its momentum p ii. kinetic energy KE = 1/2mv2 a. If the velocity of the 250 kg-object changes to 45 m/s, what is the impulse on the object? b. What is its acceleration if the final velocity was attained after 5 seconds? 4. a. When does an object experience a free fall motion? b A rock is thrown down a cliff. If it hits the surface of a pond in 15 s, what distance did the rock travel? [g = 9.8 m/s]