A hiker walks 3.00 km north and then 4.00 km west, all in one hour and forty minutes. Calculate his average speed in km/h.

A woman walks a distance of $240 \mathrm{~m}$ with an average speed of $1.2 \mathrm{~m} / \mathrm{s}$. What time was required to walk this distance?

A driver travels at an average speed of $68 \mathrm{MPH}$ for  $2.5$ hours. How far does she travel throughout this period?

When a lawn is mowed two weeks (14 days) after the prior mowing, it is discovered that grass cuttings have an average length of $5.2 \mathrm{~cm}$. What is the typical growth rate of this grass, measured in mathrm cm per day?

A walker completes a  $2.4 \mathrm{~km}$ route in 30 minutes. What is the walker's average speed in  $\mathrm{km} / \mathrm{h}$ for this distance?

A traveler covers a distance of 460 miles in a time of 8 hours. What is the average speed for this trip?A traveler covers a distance of 460 miles in a time of 8 hours. What is the average speed for this trip?

Explain whether the following particles do or do not have an acceleration: a particle moving in a straight line with constant speed

A quarterback throws a football toward a receiver with an initial speed of 20 m/s at an angle of $30 ^ { \circ }$ above the horizontal. At that instant the receiver is 20 m from the quarterback. In (a) what direction and (b) with what constant speed should the receiver run in order to catch the football at the level at which it was thrown?

A ball is thrown straight upward and returns to the thrower’s hand after 3.00 s in the air. A second ball thrown at an angle of $30.0 ^ { \circ }$ with the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? (b) At what speed was the second ball thrown?

A home run is hit in such a way that the baseball just clears a wall 21 m high, located 130 m from home plate. The ball is hit at an angle of $35 ^ { \circ }$ to the horizontal, and air resistance is negligible. Find the velocity components and the speed of the ball when it reaches the wall. (Assume the ball is hit at a height of 1.0 m above the ground.)

A home run is hit in such a way that the baseball just clears a wall 21 m high, located 130 m from home plate. The ball is hit at an angle of $35 ^ { \circ }$ to the horizontal, and air resistance is negligible. Find the time it takes the ball to reach the wall.

A home run is hit in such a way that the baseball just clears a wall 21 m high, located 130 m from home plate. The ball is hit at an angle of $35 ^ { \circ }$ to the horizontal, and air resistance is negligible. Find the initial speed of the ball.

(a) If a person can jump a maximum horizontal distance (by using a $45 ^ { \circ }$ projection angle) of 3.0 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s$^2$? (b) Repeat for Mars, where the acceleration due to gravity is 0.38g.

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer on shore determines the velocities of the two canoes to be -1.2 m/s and +2.9 m/s, respectively. What is the speed of each canoe relative to the water?