A body is thrown vertically upwards with a speed of 20 m/s. How high will it ris

A body is thrown vertically upwards with a speed of 20 m/s. How high will it rise? (g = 10 m/s²)

A body is thrown vertically upwards with a speed of 20 m/s. How high will it rise? (g = 10 m/s²)

Correct Answer: 20 m

Step 1: Identify the initial speed (u) of the body, which is 20 m/s.
Step 2: Identify the final speed (v) at the highest point, which is 0 m/s (the body stops rising at the peak).
Step 3: Identify the acceleration due to gravity (g), which is 10 m/s² (this acts downwards).
Step 4: Use the formula v² = u² - 2gh to find the height (h).
Step 5: Substitute the values into the formula: 0 = (20)² - 2*10*h.
Step 6: Calculate (20)², which is 400.
Step 7: Rewrite the equation: 0 = 400 - 20h.
Step 8: Rearrange the equation to solve for h: 20h = 400.
Step 9: Divide both sides by 20 to find h: h = 400 / 20.
Step 10: Calculate h, which equals 20 m.

Kinematics – The study of motion, specifically how objects move under the influence of forces, including equations of motion.
Energy Conservation – The principle that energy cannot be created or destroyed, only transformed, which applies to the conversion of kinetic energy to potential energy in this scenario.