1D, 2D and 3D Motion

A baseball pitcher is warming up as he travels to a game by plane. The plane is flying at 400 km/h ] relative to the ground. The pitcher throws the ball at 150 km/h towards the front of the airplane. What is the ball’s velocity relative to the ground?

• 250 km/h

• 350 km/h

• 450 km/h

• 550 km/h

A baseball pitcher is warming up as he travels to a game by plane. The plane is flying at 400 km/h ] relative to the ground. The pitcher throws the ball at 150 km/h towards the back of the airplane. What is the ball’s velocity relative to the ground?

• 150 km/h

• 250 km/h

• 350 km/h

• 450 km/h

• A conductor in a train travelling at 12.0 km/h [North] relative to the ground while he walks across the aisle at 5.0 km/h [East] relative to the train. What is his velocity relative to the ground? ...HINT: Use a^2 + b^2 = c^2

• 7 km/h [NE]

• 1.71 km/h [NE]

• 60 km/h [NE]

• 13.0 km/h [NE]

If a car coming towards you going 90 km/hr south while you are driving 80 km/hr north, how far is the car moving relative to your car

• 170 km/hr

• 90 km/hr

• 80 km/hr

• 10 km/hr

A boat heading NORTH crosses a wide river

with a velocity of 10.00 km/h relative to the water. The river has a uniform velocity of 5.00 km/h due EAST. Determine the boat’s speed with respect to an observer on shore. ...HINT: use a^2 + b^2 = c^2

• 11.18 km/hr

• 15 km/hr

• 5 km/hr

• 30 km/hr

A passenger at the rear of a train traveling at 15 m/s relative to Earth throws a baseball with a speed of 15 m/s in the direction opposite the motion of the train.

What is the velocity of the baseball relative to Earth as it leaves the thrower’s hand?

• 30 m/s

• 15 m/s

• 0 m/s

• 20 m/s

Tags

NGSS.HS-PS2-2

How fast does the plane appear to be moving to a person riding in the car?

• 520 m/s
• 460 m/s
• 30 m/s
• 490 m/s

A jet plane travelling horizontally at 1200 km/h relative to the ground fires a rocket forwards at 1100 km/h relative to itself. What is the velocity of the rocket relative to the ground.

• 2300 km/h

• 2500 km/h

• 3000 km/h

• 3500 km/h

Tags

NGSS.HS-PS2-2

An airplane traveling north at 220 meters per second encounters a 50 m/s headwind (into the head of the plane). What is the speed of the plane respect to the ground?

• 170 m/s

• 270 m/s

• 11000 m/s

• 4.4 m/s

An insect walks 2 m/s towards the front of a car that is going 50 m/s forwards. What is the insect's velocity relative to the ground?

• 2 m/s

• 48 m/s

• 50 m/s

• 52 m/s