Which of the following distance-time graphs shows a truck moving with speed which is not constant?
The Correct Option is A
Solution and Explanation
Top Questions on Speed
- An engine’s torque-speed characteristics is given below:
\( T_{{\text{maxP}}} = 125 \, \text{N.m}, \, N_{{\text{maxP}}} = 2400 \, \text{rpm}, \, N_{{\text{HI}}} = 2600 \, \text{rpm}, \, T_{{\text{max}}} = 160 \, \text{N.m}, \, N_{{\text{maxT}}} = 1450 \, \text{rpm} \)
Where:\( T_{{\text{maxP}}} = \text{torque at maximum power}, \quad T_{{\text{max}}} = \text{maximum torque}, \quad N_{{\text{maxP}}} = \text{speed at maximum power}, \quad N_{{\text{maxT}}} = \text{speed at maximum torque}, \quad N_{{\text{HI}}} = \text{speed at high idle}. \)
The Governor’s regulation is _________% (Rounded off to 2 decimal places). - Considering acceleration due to gravity as 9.81 m.s\(^{-2}\) and \( \pi \) as 3.14, the critical speed of a ball mill having 3600 mm mill diameter and 160 mm ball diameter is _________ rpm. (Answer in integer)
- A solid round uniform diameter shaft is transmitting 25 kW power at 540 rpm. The maximum allowable shear stress of the shaft material is 35 MPa. If the maximum torque exceeds the mean torque by 20%, neglecting the bending effect, the minimum shaft diameter is _________ mm. (Rounded off to 2 decimal places)
- A stable drop structure is designed with a base length of 5.7 m. The sum of vertical forces excluding uplift is 92.5 kN, sum of uplift forces is 72.5 kN, and sum of moments of all the horizontal and vertical forces about an axis passing through mid-section of base length is 60 kN.m. The eccentricity denoting the longitudinal distance between the centroid of base area and the point of application of resultant vertical load is _________ m. (Rounded off to 2 decimal places)
- If a gear 'A' having 50 teeth and running at a speed of 200 rpm is driving to another gear 'B' having 125 rpm. How many number of teeth are there in gear 'B'?
Questions Asked in CBSE Class VII exam
- A vehicle covers a distance of 43.2 km in 2.4 litres of petrol. How much distance will it cover in one litre of petrol?
- CBSE Class VII
- Division Of Decimal Numbers
- Find:
(i) 2.5 × 0.3
(ii) 0.1 × 51.7
(iii) 0.2 × 316.8
(iv) 1.3 × 3.1
(v) 0.5 × 0.05
(vi) 11.2 × 0.15
(vii) 1.07 × 0.02
(viii) 10.05 × 1.05
(ix) 101.01 × 0.01
(x) 100.01 × 1.1- CBSE Class VII
- Multiplication Of Decimal Numbers
- Vidya and Pratap went for a picnic. Their mother gave them a water bottle that contained 5 litres of water. Vidya consumed 2 / 5 of the water. Pratap consumed the remaining water.
(i) How much water did Vidya drink?
(ii) What fraction of the total quantity of water did Pratap drink?- CBSE Class VII
- Multiplication Of Fractions
- Find:
(i) 7 ÷ 3.5
(ii) 36 ÷ 0.2
(iii) 3.25 ÷ 0.5
(iv) 30.94 ÷ 0.7
(v) 0.5 ÷ 0.25
(vi) 7.75 ÷ 0.25
(vii) 76.5 ÷ 0.15
(viii) 37.8 ÷ 1.4
(ix) 2.73 ÷ 1.3- CBSE Class VII
- Division Of Decimal Numbers
Write equations for the following statements:
(i) The sum of numbers x and 4 is 9.
(ii) 2 subtracted from y is 8.
(iii) Ten times a is 70.
(iv) The number b divided by 5 gives 6.
(v) Three-fourth of t is 15.
(vi) Seven times m plus 7 gets you 77.
(vii) One-fourth of a number x minus 4 gives 4.
(viii) If you take away 6 from 6 times y, you get 60.
(ix) If you add 3 to one-third of z, you get 30- CBSE Class VII
- A Mind-Reading Game