B work = gravitational potential energy
Answer:
C. 2.3 m
Explanation:
Centripetal acceleration is:
a = v² / r
Given a = 532.6 m/s² and v = 35 m/s:
532.6 m/s² = (35 m/s)² / r
r = 2.3 m
Answer:
The first vehicles fitted with an alternator was vehicles during WWll.
Chrysler Corporation fitted an alternator on the Valiant 1960 as standard equipment
Explanation:
Answer:
The new resistor has resistance of 9Ω.
Explanation:
The effective resistance of three resistance is
.
we know the the circuit with 9V battery has current of 3.6A; therefore, must be
,
which means
Now, Sally wants to connect another resistor in parallel so that the current becomes 4.6A. The resistance required for that is
.
which means the 4th resistor must satisfy the equation
and since
equation (2) becomes
which we solve for :
Thus, the resistance of the new resistor is 9 ohms.
The speed of an object can be determined from the distance vs time graph.
You know that speed = distance/time
in the graph, distance/time = slope of the curve.
So SPEED IS GIVEN BY THE SLOPE of the curve in the graph.
● If the distance vs time curve is a straight line, parallel to time axis(x-axis), slope is 0. That means speed is 0. So the object is at rest.
● If the distance vs time curve is a straight line, with some non-zero slope; That means speed is nonzero and constant. So the object is in uniform motion.
● If the distance vs time curve is a curved, the slope is changing. That means speed is changing. So the object is in an accelerated motion.