restrict character's speed on only x and z axis

Questions & Answers
1

My character have an rigidbody and move using addForce.
I want to restrict the speed hence I check the rigibody magnitude.
while when my character is running at the maxSpeed,
it fail to jump, or jump a bit and stop due to the magnitude.
how can I only restrict the speed on the x and z axis so that Imy character can jump correctly?

void moveCharacterAndSetAnimation(float horizontal, float vertical){
		Vector3 movement = new Vector3 (horizontal, 0f, vertical);
		setAnimation (animationId.running);
		playerGameObject.transform.forward = Vector3.Normalize (movement);
		rb.AddForce (movement*froceAmount,ForceMode.Acceleration); 
		if(rb.velocity.magnitude >maxSpeed){
			rb.velocity = rb.velocity.normalized * maxSpeed;
		}
	}

private bool checkIsGrounded(){
		return Physics.Raycast(playerGameObject.transform.position, -Vector3.up, distToGround + 0.1f);
	}

	public void checkJump(){
		if((Input.GetKeyDown(KeyCode.Space)||Input.GetKeyDown(KeyCode.Mouse0))&&checkIsGrounded()){
			jumpCharacter();
		}
	}
void jumpCharacter(){
		rb.AddForce(playerGameObject.transform.up * 500, ForceMode.Impulse);
	}
2

Is your character not jumping or?

maybe do something like:

public float jumpForce = 220;

if (Input.GetButtonDown(“Jump”)) {

		if (grounded) {
			rigidbody.AddForce(transform.up * jumpForce);
		}
	}