Question

1. State true or false: The displacement of a moving object in a given interval of
time is zero. Then the distance travelled by the object is also must be zero.
A) true
B) false
2. The odometer of a car reads 1500 km at the start of a trip and 1700 km at the end
of the trip. If the trip took 4 h, calculate the average speed of the car in m/s.
3.Fill in the blanks: The path followed by a projectile is called its
A)territory
B)trajectory
C) orbit
D) none of these
4.
In the following distance vs time graph which of the following parameter is zero.
Distance - Time Graph
GO
0
0 12 B 1
ine
a) Speed
b) Velocity
c) Acceleration
d) Displacement
5. A man swims in a 50 m long pool. He covers 100 m in one minute by swimming
from one end to the other and back along the same straight path. Find the
average velocity of the man.​

Answer 1

Answer:

• 1)B -false, because displacement can be zero(when the body returns to initial position)even there is a distance covered..
• 2) Average speed=total distance/total time taken

=(1700-1500)/4

=50km/hr

=50×(5/18)m/s

=13.8m/s

• 3)B - it's trajectory
• 4)____
• 5)average velocity= zero, since he swim backs to the initial point..

hope this helps..