Update app.py

app.py

@@ -6,87 +6,104 @@ st.title("Self Learn Kinematics")
 st.write("If velocity value is positive, the object is travelling to the right.")
 st.write("If velocity value is negative, the object is travelling in the opposite direction to the left.")
 
-# Input for initial velocity, u
-u = st.number_input("Enter the initial velocity (u) in metres per second:", step=0.1, format="%.1f")
+# State variables to hold input values and results
+if 'u' not in st.session_state:
+    st.session_state.u = 0.0
+if 'v' not in st.session_state:
+    st.session_state.v = 0.0
 
-# Determine the initial direction
-if u < 0:
-    initial_direction = "travelling to the left"
-elif u > 0:
-    initial_direction = "travelling to the right"
-else:
-    initial_direction = "at rest"
+# Input for initial velocity, u
+u = st.number_input("Enter the initial velocity (u) in metres per second:", value=st.session_state.u, step=0.1, format="%.1f")
 
 # Input for final velocity, v
-v = st.number_input("Enter the final velocity (v) in metres per second:", step=0.1, format="%.1f")
+v = st.number_input("Enter the final velocity (v) in metres per second:", value=st.session_state.v, step=0.1, format="%.1f")
+
+# Buttons for submitting and clearing inputs
+if st.button("Submit"):
+    st.session_state.u = u
+    st.session_state.v = v
+
+    # Determine the initial direction
+    if st.session_state.u < 0:
+        initial_direction = "travelling to the left"
+    elif st.session_state.u > 0:
+        initial_direction = "travelling to the right"
+    else:
+        initial_direction = "at rest"
+
+    # Determine the final direction
+    if st.session_state.v < 0:
+        final_direction = "travelling to the left"
+    elif st.session_state.v > 0:
+        final_direction = "travelling to the right"
+    else:
+        final_direction = "at rest"
 
-# Determine the final direction
-if v < 0:
-    final_direction = "travelling to the left"
-elif v > 0:
-    final_direction = "travelling to the right"
-else:
-    final_direction = "at rest"
+    # Display initial and final velocities information
+    st.write(f"Initial velocity (u): {st.session_state.u} m/s means object is {initial_direction} with a speed of {abs(st.session_state.u)} m/s.")
+    st.write(f"Final velocity (v): {st.session_state.v} m/s means object is {final_direction} with a speed of {abs(st.session_state.v)} m/s.")
 
-# Display initial and final velocities information
-st.write(f"Initial velocity (u): {u} m/s means object is {initial_direction} with a speed of {abs(u)} m/s.")
-st.write(f"Final velocity (v): {v} m/s means object is {final_direction} with a speed of {abs(v)} m/s.")
+    # Determine and display the motion description based on the conditions
+    if st.session_state.u < 0:
+        if st.session_state.v == st.session_state.u:
+            st.write("u < 0, v = u")
+            st.write("Object was initially travelling to the left.")
+            st.write("Object continued travelling to the left with constant speed.")
+        elif st.session_state.v < st.session_state.u:
+            st.write("u < 0, v < u")
+            st.write("Object was initially travelling to the left.")
+            st.write("Object continued travelling to the left, accelerated and increased its speed.")
+        elif st.session_state.v == 0:
+            st.write("u < 0, v = 0")
+            st.write("Object was initially travelling to the left.")
+            st.write("Object continued travelling to the left, decelerated, decreased its speed and stopped.")
+        elif st.session_state.v > st.session_state.u and st.session_state.v < 0:
+            st.write("u < 0, v > u and v < 0")
+            st.write("Object was initially travelling to the left.")
+            st.write("Object continued travelling to the left, decelerated and decreased its speed.")
+        elif st.session_state.v > st.session_state.u and st.session_state.v > 0:
+            st.write("u < 0, v > u and v > 0")
+            st.write("Object was initially travelling to the left.")
+            st.write("Object continued travelling to the left, decelerated, decreased its speed and stopped.")
+            st.write("Object then accelerated and travelled to the right.")
+    elif st.session_state.u > 0:
+        if st.session_state.v == st.session_state.u:
+            st.write("u > 0, v = u")
+            st.write("Object was initially travelling to the right.")
+            st.write("Object continued travelling to the right with constant speed.")
+        elif st.session_state.v > st.session_state.u:
+            st.write("u > 0, v > u")
+            st.write("Object was initially travelling to the right.")
+            st.write("Object continued travelling to the right, accelerated and increased its speed.")
+        elif st.session_state.v == 0:
+            st.write("u > 0, v = 0")
+            st.write("Object was initially travelling to the right.")
+            st.write("Object continued travelling to the right, decelerated, decreased its speed and stopped.")
+        elif st.session_state.v < st.session_state.u and st.session_state.v > 0:
+            st.write("u > 0, v < u and v > 0")
+            st.write("Object was initially travelling to the right.")
+            st.write("Object continued travelling to the right, decelerated and decreased its speed.")
+        elif st.session_state.v < st.session_state.u and st.session_state.v < 0:
+            st.write("u > 0, v < u and v < 0")
+            st.write("Object was initially travelling to the right.")
+            st.write("Object continued travelling to the right, decelerated, decreased its speed and stopped.")
+            st.write("Object then accelerated and travelled to the left.")
+    elif st.session_state.u == 0:
+        if st.session_state.v == st.session_state.u:
+            st.write("Object was initially at rest.")
+            st.write("u = 0, v = u")
+            st.write("Object continued resting.")
+        elif st.session_state.v > st.session_state.u:
+            st.write("Object was initially at rest.")
+            st.write("u = 0, v > u")
+            st.write("Object accelerated and increased its speed to travel to the right.")
+        elif st.session_state.v < st.session_state.u:
+            st.write("Object was initially at rest.")
+            st.write("u = 0, v < u and v < 0")
+            st.write("Object accelerated and increased its speed to travel to the left.")
 
-# Determine and display the motion description based on the conditions
-if u < 0:
-    if v == u:
-        st.write("u < 0, v = u")
-        st.write("Object was initially travelling to the left.")
-        st.write("Object continued travelling to the left with constant speed.")
-    elif v < u:
-        st.write("u < 0, v < u")
-        st.write("Object was initially travelling to the left.")
-        st.write("Object continued travelling to the left, accelerated and increased its speed.")
-    elif v == 0:
-        st.write("u < 0, v = 0")
-        st.write("Object was initially travelling to the left.")
-        st.write("Object continued travelling to the left, decelerated, decreased its speed and stopped.")
-    elif v > u and v < 0:
-        st.write("u < 0, v > u and v < 0")
-        st.write("Object was initially travelling to the left.")
-        st.write("Object continued travelling to the left, decelerated and decreased its speed.")
-    elif v > u and v > 0:
-        st.write("u < 0, v > u and v > 0")
-        st.write("Object was initially travelling to the left.")
-        st.write("Object continued travelling to the left, decelerated, decreased its speed and stopped.")
-        st.write("Object then accelerated and travelled to the right.")
-elif u > 0:
-    if v == u:
-        st.write("u > 0, v = u")
-        st.write("Object was initially travelling to the right.")
-        st.write("Object continued travelling to the right with constant speed.")
-    elif v > u:
-        st.write("u > 0, v > u")
-        st.write("Object was initially travelling to the right.")
-        st.write("Object continued travelling to the right, accelerated and increased its speed.")
-    elif v == 0:
-        st.write("u > 0, v = 0")
-        st.write("Object was initially travelling to the right.")
-        st.write("Object continued travelling to the right, decelerated, decreased its speed and stopped.")
-    elif v < u and v > 0:
-        st.write("u > 0, v < u and v > 0")
-        st.write("Object was initially travelling to the right.")
-        st.write("Object continued travelling to the right, decelerated and decreased its speed.")
-    elif v < u and v < 0:
-        st.write("u > 0, v < u and v < 0")
-        st.write("Object was initially travelling to the right.")
-        st.write("Object continued travelling to the right, decelerated, decreased its speed and stopped.")
-        st.write("Object then accelerated and travelled to the left.")
-elif u == 0:
-    if v == u:
-        st.write("Object was initially at rest.")
-        st.write("u = 0, v = u")
-        st.write("Object continued resting.")
-    elif v > u:
-        st.write("Object was initially at rest.")
-        st.write("u = 0, v > u")
-        st.write("Object accelerated and increased its speed to travel to the right.")
-    elif v < u:
-        st.write("Object was initially at rest.")
-        st.write("u = 0, v < u and v < 0")
-        st.write("Object accelerated and increased its speed to travel to the left.")
+# Clear button
+if st.button("Clear"):
+    st.session_state.u = 0.0
+    st.session_state.v = 0.0
+    st.experimental_rerun()  # Rerun the script to reset the input fields and clear the output