Jump.cs

private bool jumpNow;
public float jumpPower; //調整必要 例850
private void OnCollisionEnter(Collision other) {
	if (jumpNow == true) {
		if (other.gameObject.CompareTag("Ground")) {
			jumpNow = false;
		}
	}
}

void Jump() {
	if (jumpNow == true) return;
	if (Input.GetKeyDown(KeyCode.Space)) {
		rb.AddForce(transform.up * jumpPower, ForceMode.Impulse);
		jumpNow = true;
	}
}