Question

1. Which of the following is not a scalar?
a) velocity
b) speed
c) mass
d) volume
2. The number of significant figures in the numbers 4.8000 x 109 and 48000.50 are respectively
a) 5 and 6
b) 5 and 7
c) 2 and 7
d) 2 and 6
3. The dimensional formula for impulse = Force x time is
a) MLT1
b) MLT
C) MLT1
4. The dimensional formula (ML?T?) represents
a) work
b) force
c) acceleration d) momentum
5. Which of the following equations is dimensionally correct?
L
L
L
a) T =
b) T =
C) T = 2M
d) T = 21,
g
g
g
d) MLT1
6.
c) LT
7.
Dimension of a/b in the equation P =
a-t
where P is pressure, x is distance and t is time
bx
are
a) M?LT3
b) MT2
d) MLT1
A cyclist starts from the centre o of a circular park of radius one kilometre, reaches the edge
P of the park, then cycles along the circumference reaches Q and then returns to the centre
along QO as shown in figure. The distance travelled & displacement of the cyclist (in km) is,
a) 2.57,
1 +4
b) 0, 2.5
2
c) 2.57, 2.51 d) 2.51, 0
8. An aeroplane is flying with a uniform speed of 100 km/hour along the circumference of a
circle. The change in velocity in half the revolution will be (kmh--)
a) 100
b) 200
c) 300
d) 150
9. A car moving with a velocity of 20 ms? is stopped in a distance of 40 m. If the same car is
travelling at double the velocity, the distance travelled by it for same retardation is
b) 320 m
640 m
d) 160 m
c) 1280 m

Answer 1

Answer:

1.velocity is the answer and not scalar

Answer 2

Answer:

velocity is not a scalar