A man standing on a bridge throws a stone horizontally with a speed of 80 m/s. The stone hits
the water below 7.0 s later. The bridge is - answer✔240.10000000000002 m high.
Suppose you throw a ball vertically downward with a speed of 50 m/s. Neglecting air friction,
what would be the speed of the ball one second later? - answer✔60 m/s
Suppose a graph of displacement of a body versus time is constructed. The slope of the graph at
any point may be identified with - answer✔instantaneous velocity
An iron robot falls from rest at a great height. Neglecting air resistance, what is its speed after it
has fallen for 2 seconds? - answer✔20 m/s.
A student releases a ball from rest on an inclined plane and measures that it travels a distance of
0.3 m in a time of 4.0 s. The acceleration of the ball is - answer✔0.0375 m/s2
An auto, starting from rest, undergoes constant acceleration and covers a distance of 1600
meters. The final speed of the auto is 80 meters/sec. How long does it take the car to cover the
1600 meters? - answer✔40 s.
The frictional force, due to air resistance, acting on an object is always - answer✔in the opposite
direction to the object's motion.
A child, whose weight is 150 newtons, lifts a pumpkin from the ground with a force of 50
newtons. The force the pumpkin exerts on the child is - answer✔50 newtons.
A car traveling at constant speed - answer✔can change direction.
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