23 Physics Spring DPM Review 2nd

Airplane drop: An airplane is flying horizontally, it drops a package while it is in motion: Where does the package land?

• behind the airplane

• under the airplane

• in front of the airplane

A rock is kicked horizontally off the ledge of a building at a velocity of 5 m/s. The building is 14.6 m high. How long does it take to the rock to hit the ground?

• 2.92s
• 1.7s
• 8.5s
• 5s

A rock is kicked horizontally off the ledge of a building at a velocity of 5 m/s. The building is 14.6 m high and it takes 1.7s to fall down. How far away from the building will the rock land?

• 14.6m
• 8.5m
• 42.5m
• 25m

Describe the horizontal components of a horizontally launched projectile:

• acceleration is zero velocity is increasing
• acceleration is zero velocity is constant
• acceleration is zero velocity is decreasing
• acceleration is -10m/s/s velocity is constant

Describe the vertical components of a horizontally launched projectile :

• acceleration is zero velocity is increasing
• acceleration is zero velocity is constant
• acceleration is -10 m/s/s velocity is changing by 10m/s every second
• acceleration is -10m/s/s velocity is constant

As the height increased the time in the air of a projectile

• increase
• decrease
• remain unchanged

Does the horizontal distance (range) an object flies depend on its mass?

• yes
• no

A student rubs a balloon on his hair and the balloon becomes negatively charged. What is the net charge of the student’s hair?

• positive
• negative
• neutral

A student rubs a balloon on his hair and the balloon becomes negatively charged. Which particles moved to cause this net charge?

• proton
• electron
• neutron

A student rubs a balloon on his hair and the balloon becomes negatively charged. Did these particles move from the balloon to the hair or the hair to the balloon?

• from the balloon to the hair
• from the hair to the balloon