4. An airplane has an airspeed of 500 kph bearing N40E. The wind velocity is 60 kph in the direction of N30W. Find the resultant vector representing the path of the plane relative to the ground. What is the ground speed of the plane? What is the direction?

The ground speed of the plane is 513.6 km/hr.

The direction is 46.59°

Explanation:

Given that,

Air speed of plane = 500 kph

Wind speed = 60 kph

The velocity of plane is

Put the value into the formula

The velocity of wind is

Put the value into the formula

We need to calculate the ground speed of plane

The ground speed is

We need to calculate the direction

Using formula of direction

Hence, The ground speed of the plane is 513.6 km/hr.

The direction is 46.59°

im not to sure what it is

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.