PROBLEM SOLVING 1 o A boy run 5 km due west and then return back to
travel a further distance of 4 km before resting. The
whole journey takes 1 hour. Calculate
his total distance travelled,
• his average speed,
• his displacement from the starting point,
• his average velocity.​

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

Amoving freight car collides with an identical one that is at rest. if momentum is conserved, what happens to the second car after the collision? it attains the same speed as the first car. it moves at half the speed of the first car. it moves at twice the speed of the first car.