Hi,

I spawn my model 1 meter above the ground. If my model touch the ground 
its bounce back but it shouldn't it has a weight of 300 kg (see below). 
How can I change this behaviour and where (world file)?


    <link name="base_link">
        <inertial>
            <origin xyz="0 0 0.630" rpy="0 0 0"/>
            <mass value="300"/>
            <inertia ixx="100" ixy="100" ixz="100" iyy="100" iyz="100" 
izz="100"/>
        </inertial>
        <visual>
            <geometry>
                <box size=" 0.956 0.515 0.100"/>
            </geometry>
        </visual>
        <collision>
            <origin xyz="0 0 0"/>
                  <geometry>
                    <box size="0.956 0.515 0.100"/>
                  </geometry>
            </collision>
    </link>