Can you visualize how a car reaches high speeds and how a person scales high cliffs?
Text Solution
AI Generated Solution
To understand how a car reaches high speeds and how a person scales high cliffs, we can break down the concepts of kinetic energy and potential energy, as well as the sources of energy involved in each case.
### Step-by-Step Solution:
1. **Understanding Kinetic Energy in a Car:**
- A car reaches high speeds by acquiring kinetic energy. Kinetic energy is the energy of motion, which depends on the mass of the car and the square of its velocity.
- The formula for kinetic energy (KE) is given by:
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Knowledge Check
High speed winds are accompanied by :
A
low air pressure
B
high air pressure
C
zero air pressure
D
moderate air pressure
A train goes past a person standing at the edge of a platform at high speed. Then the person will be
A
attracted towaeds the train
B
unaffected by the train
C
pushed away by the train
D
affected only if its speed is greater than critical velocity.
If a person is driving a car at a speed of 30 m/s, then in how much time person will cover a distance of 1620 km?
A
54 hr
B
15 hr
C
13 hr
D
12 hr
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