Accelerate,

    if keyboard_inputs.just_pressed(KeyCode::A) {
        input_events.send(InputEvent::Accelerate);
    }

    acceleration_value: f32,

            impulse_value: 30.,

            impulse_value: 15.,
            acceleration_value: 0.3,

    mut materials: ResMut<Assets<ColorMaterial>>,

        friction: 0.1,

        friction: 0.,

            InputEvent::Accelerate => {
                for (mut velocity, mass_props, _) in rigid_bodies.iter_mut() {
                    let impulse = velocity.linvel * constants.acceleration_value;
                    velocity.apply_impulse(mass_props, impulse.into());
                }
            }