Physical Science - Chapter 2 Reading Check Quiz

Suppose you're coasting in a car at 60 km/h and apply the brakes until you slow to 40 km/h. When you suddenly release the brake, the car tends to

Continue moving at 40 km/h in the absence of forces

Arnold Strongman and Suzie Small have a tug-of-war on a polished floor. Arnold wears socks and Suzie wears gym shoes. The likely winner is

Suzie

An empty roller coaster car at an amusement park takes 3 min to make its ride from start to finish. Neglecting friction, a fully loaded car would take

3 min

A 500-N parachutist opens his chute and experiences an air resistance force of 800 N. The net force on the parachutist is

300 N upward

An object travels 8 m in the first second of travel, 8 m again during the second second of travel, and 8 m again during the third second. Its acceleration in meters per second per second is

0

An apple weighs 1 N. The magnitude of net force on the apple when it is in free-fall is

1 N

The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about

1.2 m

A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is

About 30 m/s

Suppose a particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a second force of 10 N in the opposite direction of the first force. The particle with both forces acting on it

Continues at the speed it had when it encountered the second force

According to Newton's law of inertia, the result of walking much of the day is similar to tightening the head of a hammer when its handle hits a solid surface (Figure 2.2 in the text) so that we are actually a little bit shorter in the

Evening