A jar with mass of 10kg is measured in 1500g. Fluid. What is the density?

$$
\rho = 6666.67 \text{ kg/m}^3
$$
The density of the fluid is $\boxed{\text{6666.67 kg/m}^3\text{}}$.

2. The density of a boat is $250 \text{ kg/m}^3$. Filled with a mass of $13 \text{ kg}$, calculate the volume of the boat.

density ($\rho$) and mass ($m$). $\rho = 250 \text{ kg/m}^3$ $m = 13 \text{ kg}$

$$
V = 0.052 \text{ m}^3
$$
The volume of the boat is $\boxed{\text{0.052 m}^3\text{}}$.

3. What is the force of a $20 \text{ kg}$ tricycle that accelerates at a rate of $6 \text{ m/s}^2$?

mass ($m$) and acceleration ($a$). $m = 20 \text{ kg}$ $a = 6 \text{ m/s}^2$

$$
F = 120 \text{ N}
$$
The force is $\boxed{\text{120 N}}$.

4. A vehicle speeds at $10 \text{ m/s}$ with a force of $500 \text{ N}$. Calculate the mass of the vehicle. * This problem cannot be solved as stated. To calculate the mass of the vehicle using the given force, the acceleration of the vehicle is required ($F=ma$). The speed of $10 \text{ m/s}$ alone is not sufficient to determine acceleration without additional information such as initial speed, time, or distance over which the force acts. If the speed is constant, the net force is zero, which contradicts the given $500 \text{ N}$ force.

5. A car travels with a speed of $13 \text{ m/s}$ for $5 \text{ seconds}$. Calculate the displacement.

speed ($v$) and time ($t$). $v = 13 \text{ m/s}$ $t = 5 \text{ s}$

$d = v \times t$. $d = 13 \text{ m/s} \times 5 \text{ s}$